之前發(fā)布過的BaseActivity還有不完善的地方，此版本進(jìn)行的完善，加上了黑色/白色狀態(tài)欄的開關(guān)以及一些小工具。
有問題的話歡迎評(píng)論。
使用方法很簡單，將你的Activity繼承這個(gè)BaseActivity即可，要實(shí)現(xiàn)沉浸狀態(tài)欄，在onCreate方法調(diào)用
setTranslucentStatus(boolean on,boolean darkmode);
即可，參數(shù)說明，on=是否開啟沉浸式狀態(tài)欄，darkmode=狀態(tài)欄文字顏色模式是否為黑色
除此之外，需要在Activity的layout文件中加入
<LinearLayout
android:id="@+id/sys_statusBar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="gone">
</LinearLayout>
此布局是用于狀態(tài)欄透明時(shí)透明部分的占位布局，因?yàn)锳ctivity主布局在透明狀態(tài)欄時(shí)需要向下位移一段位置，這段位置就是用此LinearLayout占位的。個(gè)人建議創(chuàng)建一個(gè)Layout，below此布局即可。
在添加此布局后需要調(diào)用如下代碼使占位布局生效：
//如果sys_statusBar的父布局是RelativeLayout則調(diào)用
setStatusBarHeight();
//如果sys_statusBar的父布局是LinearLayout則調(diào)用
setStatusBarHeightByLayout(sysStatusBar);
其次，在BaseActivity中我是用了“me”這個(gè)詞代替了this，因?yàn)樵诖a中常用到需要使用this的地方在內(nèi)部類中或是在監(jiān)聽器中，此時(shí)必須使用xxActivity.this十分麻煩，在此情況下直接使用me即可，例如：
btnA.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(me,IntentActivity.class);
startActivity(intent);
}
});
附帶的小工具如下：
//簡易吐司：
toast(Obj);
//簡易Log打印日志：
log(Obj);
//軟鍵盤開關(guān)：
setIMMStatus(boolean show, EditText editText);
//dip與像素px轉(zhuǎn)換：
dip2px(Context context, float dpValue);
//像素px與dip轉(zhuǎn)換：
dip2px(Context context, float dpValue);
以下是BaseActivity 3.0的完整代碼：
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;
import 你的包名.BuildConfig;
import 你的包名.R;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
/**
* Created by chao on 2016/3/3.
* 半透明狀態(tài)欄形式的Activity
* 以及對原生安卓、MIUI、flyme的透明狀態(tài)欄顯示灰色圖標(biāo)文字的支持
* 我只想說太tm麻煩了
*/
public class BaseActivity extends Activity {
public Activity me=this;
protected SystemBarTintManager mTintManager;
private static final String KEY_MIUI_VERSION_CODE = "ro.miui.ui.version.code";
private static final String KEY_MIUI_VERSION_NAME = "ro.miui.ui.version.name";
private static final String KEY_MIUI_INTERNAL_STORAGE = "ro.miui.internal.storage";
public static boolean isMIUI() {
try {
final BuildProperties prop = BuildProperties.newInstance();
return prop.getProperty(KEY_MIUI_VERSION_CODE, null) != null || prop.getProperty(KEY_MIUI_VERSION_NAME, null) != null || prop.getProperty(KEY_MIUI_INTERNAL_STORAGE, null) != null;
} catch (final IOException e) {
return false;
}
}
public static boolean isFlyme() {
try {
final Method method = Build.class.getMethod("hasSmartBar");
return method != null;
} catch (final Exception e) {
return false;
}
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mTintManager = new SystemBarTintManager(this);
}
protected void setTranslucentStatus(boolean on,boolean darkmode) {
Log.i("SDK_INT",Build.VERSION.SDK_INT+"");
if (isMIUI())setStatusBarDarkMode(darkmode,this);
if (isFlyme())setStatusBarDarkIcon(getWindow(),darkmode);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
Window window = getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
| WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(Color.TRANSPARENT);
window.setNavigationBarColor(Color.TRANSPARENT);
if (darkmode)getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN|View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
getWindow().setStatusBarColor(Color.TRANSPARENT);
return;
}else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
Window win = getWindow();
WindowManager.LayoutParams winParams = win.getAttributes();
final int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
if (on) {
winParams.flags |= bits;
} else {
winParams.flags &= ~bits;
}
win.setAttributes(winParams);
return;
}
}
public void setStatusBarDarkMode(boolean darkmode, Activity activity) {
Class<? extends Window> clazz = activity.getWindow().getClass();
try {
int darkModeFlag = 0;
Class<?> layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");
Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");
darkModeFlag = field.getInt(layoutParams);
Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);
extraFlagField.invoke(activity.getWindow(), darkmode ? darkModeFlag : 0, darkModeFlag);
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean setStatusBarDarkIcon(Window window, boolean dark) {
boolean result = false;
if (window != null) {
try {
WindowManager.LayoutParams lp = window.getAttributes();
Field darkFlag = WindowManager.LayoutParams.class.getDeclaredField("MEIZU_FLAG_DARK_STATUS_BAR_ICON");
Field meizuFlags = WindowManager.LayoutParams.class.getDeclaredField("meizuFlags");
darkFlag.setAccessible(true);
meizuFlags.setAccessible(true);
int bit = darkFlag.getInt(null);
int value = meizuFlags.getInt(lp);
if (dark) {
value |= bit;
} else {
value &= ~bit;
}
meizuFlags.setInt(lp, value);
window.setAttributes(lp);
result = true;
} catch (Exception e) {
Log.e("MeiZu", "setStatusBarDarkIcon: failed");
}
}
return result;
}
public static class BuildProperties {
private final Properties properties;
private BuildProperties() throws IOException {
properties = new Properties();
properties.load(new FileInputStream(new File(Environment.getRootDirectory(), "build.prop")));
}
public boolean containsKey(final Object key) {
return properties.containsKey(key);
}
public boolean containsValue(final Object value) {
return properties.containsValue(value);
}
public Set<Map.Entry<Object, Object>> entrySet() {
return properties.entrySet();
}
public String getProperty(final String name) {
return properties.getProperty(name);
}
public String getProperty(final String name, final String defaultValue) {
return properties.getProperty(name, defaultValue);
}
public boolean isEmpty() {
return properties.isEmpty();
}
public Enumeration<Object> keys() {
return properties.keys();
}
public Set<Object> keySet() {
return properties.keySet();
}
public int size() {
return properties.size();
}
public Collection<Object> values() {
return properties.values();
}
public static BuildProperties newInstance() throws IOException {
return new BuildProperties();
}
}
/**
* 設(shè)置占位符布局
*/
public void setStatusBarHeight() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
LinearLayout linear_bar = (LinearLayout) findViewById(R.id.sys_statusBar);
linear_bar.setVisibility(View.VISIBLE);
int statusHeight = getStatusBarHeight();
android.widget.RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) linear_bar.getLayoutParams();
params.height = statusHeight;
linear_bar.setLayoutParams(params);
}
}
public void setStatusBarHeightByLayout(LinearLayout linearLayout) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
LinearLayout linear_bar = linearLayout;
linear_bar.setVisibility(View.VISIBLE);
int statusHeight = getStatusBarHeight();
android.widget.LinearLayout.LayoutParams params = (android.widget.LinearLayout.LayoutParams) linear_bar.getLayoutParams();
params.height = statusHeight;
linear_bar.setLayoutParams(params);
}
}//end setStatusBarHeight()
/**
* 獲取狀態(tài)欄的高度
* @return
*/
private int getStatusBarHeight(){
try
{
Class<?> c=Class.forName("com.android.internal.R$dimen");
Object obj=c.newInstance();
Field field=c.getField("status_bar_height");
int x=Integer.parseInt(field.get(obj).toString());
return getResources().getDimensionPixelSize(x);
}catch(Exception e){
e.printStackTrace();
}
return 0;
}
protected final static String NULL = "";
private Toast toast;
protected void runOnMain(Runnable runnable) {
runOnUiThread(runnable);
}
//簡易吐司
public void toast(final Object obj) {
try {
runOnMain(new Runnable() {
@Override
public void run() {
if (toast == null)
toast = Toast.makeText(BaseActivity.this, NULL,Toast.LENGTH_SHORT);
toast.setText(obj.toString());
toast.show();
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
//簡易Log
public void log(final Object obj){
try {
runOnMain(new Runnable() {
@Override
public void run() {
if (BuildConfig.DEBUG) {
Log.i("log", obj.toString());
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
//軟鍵盤打開與收起
public void setIMMStatus(boolean show, EditText editText){
if (show) {
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(editText, InputMethodManager.SHOW_FORCED);
}else{
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
}
}
public static String StartFindWords="";
//用于進(jìn)行dip和px轉(zhuǎn)換
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
//用于進(jìn)行px和dip轉(zhuǎn)換
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
}
注意，此類可能需要使用到的一個(gè)類SystemBarTintManager：
public class SystemBarTintManager {
/**
* The default system bar tint color value.
*/
public static final int DEFAULT_TINT_COLOR = 0x99000000;
private final SystemBarConfig mConfig;
private boolean mStatusBarAvailable;
private boolean mNavBarAvailable;
private boolean mStatusBarTintEnabled;
private boolean mNavBarTintEnabled;
private View mStatusBarTintView;
private View mNavBarTintView;
private static boolean sIsMiuiV6;
static {
try {
Class<?> sysClass = Class.forName("android.os.SystemProperties");
Method getStringMethod = sysClass.getDeclaredMethod("get", String.class);
sIsMiuiV6 = "V6".equals((String) getStringMethod.invoke(sysClass, "ro.miui.ui.version.name"));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Constructor. Call this in the host activity onCreate method after its
* content view has been set. You should always create new instances when
* the host activity is recreated.
*
* @param activity The host activity.
*/
@TargetApi(19)
@SuppressWarnings("ResourceType")
public SystemBarTintManager(Activity activity) {
Window win = activity.getWindow();
ViewGroup decorViewGroup = (ViewGroup) win.getDecorView();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
// check theme attrs
int[] attrs = {android.R.attr.windowTranslucentStatus,
android.R.attr.windowTranslucentNavigation};
TypedArray a = activity.obtainStyledAttributes(attrs);
try {
mStatusBarAvailable = a.getBoolean(0, false);
mNavBarAvailable = a.getBoolean(1, false);
} finally {
a.recycle();
}
// check window flags
WindowManager.LayoutParams winParams = win.getAttributes();
int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
if ((winParams.flags & bits) != 0) {
mStatusBarAvailable = true;
}
bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
if ((winParams.flags & bits) != 0) {
mNavBarAvailable = true;
}
}
mConfig = new SystemBarConfig(activity, mStatusBarAvailable, mNavBarAvailable);
// device might not have virtual navigation keys
if (!mConfig.hasNavigtionBar()) {
mNavBarAvailable = false;
}
if (mStatusBarAvailable) {
setupStatusBarView(activity, decorViewGroup);
}
if (mNavBarAvailable) {
setupNavBarView(activity, decorViewGroup);
}
}
/**
* Enable tinting of the system status bar.
*
* If the platform is running Jelly Bean or earlier, or translucent system
* UI modes have not been enabled in either the theme or via window flags,
* then this method does nothing.
*
* @param enabled True to enable tinting, false to disable it (default).
*/
public void setStatusBarTintEnabled(boolean enabled) {
mStatusBarTintEnabled = enabled;
if (mStatusBarAvailable) {
mStatusBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
}
}
/**
* set status bar darkmode
* @param darkmode
* @param activity
*/
public void setStatusBarDarkMode(boolean darkmode, Activity activity) {
if (sIsMiuiV6) {
Class<? extends Window> clazz = activity.getWindow().getClass();
try {
int darkModeFlag = 0;
Class<?> layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");
Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");
darkModeFlag = field.getInt(layoutParams);
Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);
extraFlagField.invoke(activity.getWindow(), darkmode ? darkModeFlag : 0, darkModeFlag);
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* Enable tinting of the system navigation bar.
*
* If the platform does not have soft navigation keys, is running Jelly Bean
* or earlier, or translucent system UI modes have not been enabled in either
* the theme or via window flags, then this method does nothing.
*
* @param enabled True to enable tinting, false to disable it (default).
*/
public void setNavigationBarTintEnabled(boolean enabled) {
mNavBarTintEnabled = enabled;
if (mNavBarAvailable) {
mNavBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
}
}
/**
* Apply the specified color tint to all system UI bars.
*
* @param color The color of the background tint.
*/
public void setTintColor(int color) {
setStatusBarTintColor(color);
setNavigationBarTintColor(color);
}
/**
* Apply the specified drawable or color resource to all system UI bars.
*
* @param res The identifier of the resource.
*/
public void setTintResource(int res) {
setStatusBarTintResource(res);
setNavigationBarTintResource(res);
}
/**
* Apply the specified drawable to all system UI bars.
*
* @param drawable The drawable to use as the background, or null to remove it.
*/
public void setTintDrawable(Drawable drawable) {
setStatusBarTintDrawable(drawable);
setNavigationBarTintDrawable(drawable);
}
/**
* Apply the specified alpha to all system UI bars.
*
* @param alpha The alpha to use
*/
public void setTintAlpha(float alpha) {
setStatusBarAlpha(alpha);
setNavigationBarAlpha(alpha);
}
/**
* Apply the specified color tint to the system status bar.
*
* @param color The color of the background tint.
*/
public void setStatusBarTintColor(int color) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundColor(color);
}
}
/**
* Apply the specified drawable or color resource to the system status bar.
*
* @param res The identifier of the resource.
*/
public void setStatusBarTintResource(int res) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundResource(res);
}
}
/**
* Apply the specified drawable to the system status bar.
*
* @param drawable The drawable to use as the background, or null to remove it.
*/
@SuppressWarnings("deprecation")
public void setStatusBarTintDrawable(Drawable drawable) {
if (mStatusBarAvailable) {
mStatusBarTintView.setBackgroundDrawable(drawable);
}
}
/**
* Apply the specified alpha to the system status bar.
*
* @param alpha The alpha to use
*/
@TargetApi(11)
public void setStatusBarAlpha(float alpha) {
if (mStatusBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
mStatusBarTintView.setAlpha(alpha);
}
}
/**
* Apply the specified color tint to the system navigation bar.
*
* @param color The color of the background tint.
*/
public void setNavigationBarTintColor(int color) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundColor(color);
}
}
/**
* Apply the specified drawable or color resource to the system navigation bar.
*
* @param res The identifier of the resource.
*/
public void setNavigationBarTintResource(int res) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundResource(res);
}
}
/**
* Apply the specified drawable to the system navigation bar.
*
* @param drawable The drawable to use as the background, or null to remove it.
*/
@SuppressWarnings("deprecation")
public void setNavigationBarTintDrawable(Drawable drawable) {
if (mNavBarAvailable) {
mNavBarTintView.setBackgroundDrawable(drawable);
}
}
/**
* Apply the specified alpha to the system navigation bar.
*
* @param alpha The alpha to use
*/
@TargetApi(11)
public void setNavigationBarAlpha(float alpha) {
if (mNavBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
mNavBarTintView.setAlpha(alpha);
}
}
/**
* Get the system bar configuration.
*
* @return The system bar configuration for the current device configuration.
*/
public SystemBarConfig getConfig() {
return mConfig;
}
/**
* Is tinting enabled for the system status bar?
*
* @return True if enabled, False otherwise.
*/
public boolean isStatusBarTintEnabled() {
return mStatusBarTintEnabled;
}
/**
* Is tinting enabled for the system navigation bar?
*
* @return True if enabled, False otherwise.
*/
public boolean isNavBarTintEnabled() {
return mNavBarTintEnabled;
}
private void setupStatusBarView(Context context, ViewGroup decorViewGroup) {
mStatusBarTintView = new View(context);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getStatusBarHeight());
params.gravity = Gravity.TOP;
if (mNavBarAvailable && !mConfig.isNavigationAtBottom()) {
params.rightMargin = mConfig.getNavigationBarWidth();
}
mStatusBarTintView.setLayoutParams(params);
mStatusBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
mStatusBarTintView.setVisibility(View.GONE);
decorViewGroup.addView(mStatusBarTintView);
}
private void setupNavBarView(Context context, ViewGroup decorViewGroup) {
mNavBarTintView = new View(context);
LayoutParams params;
if (mConfig.isNavigationAtBottom()) {
params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getNavigationBarHeight());
params.gravity = Gravity.BOTTOM;
} else {
params = new LayoutParams(mConfig.getNavigationBarWidth(), LayoutParams.MATCH_PARENT);
params.gravity = Gravity.RIGHT;
}
mNavBarTintView.setLayoutParams(params);
mNavBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
mNavBarTintView.setVisibility(View.GONE);
decorViewGroup.addView(mNavBarTintView);
}
/**
* Class which describes system bar sizing and other characteristics for the current
* device configuration.
*
*/
public static class SystemBarConfig {
private static final String STATUS_BAR_HEIGHT_RES_NAME = "status_bar_height";
private static final String NAV_BAR_HEIGHT_RES_NAME = "navigation_bar_height";
private static final String NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME = "navigation_bar_height_landscape";
private static final String NAV_BAR_WIDTH_RES_NAME = "navigation_bar_width";
private final boolean mTranslucentStatusBar;
private final boolean mTranslucentNavBar;
private final int mStatusBarHeight;
private final int mActionBarHeight;
private final boolean mHasNavigationBar;
private final int mNavigationBarHeight;
private final int mNavigationBarWidth;
private final boolean mInPortrait;
private final float mSmallestWidthDp;
private SystemBarConfig(Activity activity, boolean translucentStatusBar, boolean traslucentNavBar) {
Resources res = activity.getResources();
mInPortrait = (res.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT);
mSmallestWidthDp = getSmallestWidthDp(activity);
mStatusBarHeight = getInternalDimensionSize(res, STATUS_BAR_HEIGHT_RES_NAME);
mActionBarHeight = getActionBarHeight(activity);
mNavigationBarHeight = getNavigationBarHeight(activity);
mNavigationBarWidth = getNavigationBarWidth(activity);
mHasNavigationBar = (mNavigationBarHeight > 0);
mTranslucentStatusBar = translucentStatusBar;
mTranslucentNavBar = traslucentNavBar;
}
@TargetApi(14)
private int getActionBarHeight(Context context) {
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
TypedValue tv = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true);
result = context.getResources().getDimensionPixelSize(tv.resourceId);
}
return result;
}
@TargetApi(14)
private int getNavigationBarHeight(Context context) {
Resources res = context.getResources();
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
if (!ViewConfiguration.get(context).hasPermanentMenuKey()) {
String key;
if (mInPortrait) {
key = NAV_BAR_HEIGHT_RES_NAME;
} else {
key = NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME;
}
return getInternalDimensionSize(res, key);
}
}
return result;
}
@TargetApi(14)
private int getNavigationBarWidth(Context context) {
Resources res = context.getResources();
int result = 0;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
if (!ViewConfiguration.get(context).hasPermanentMenuKey()) {
return getInternalDimensionSize(res, NAV_BAR_WIDTH_RES_NAME);
}
}
return result;
}
private int getInternalDimensionSize(Resources res, String key) {
int result = 0;
int resourceId = res.getIdentifier(key, "dimen", "android");
if (resourceId > 0) {
result = res.getDimensionPixelSize(resourceId);
}
return result;
}
@SuppressLint("NewApi")
private float getSmallestWidthDp(Activity activity) {
DisplayMetrics metrics = new DisplayMetrics();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
activity.getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
} else {
// TODO this is not correct, but we don't really care pre-kitkat
activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
}
float widthDp = metrics.widthPixels / metrics.density;
float heightDp = metrics.heightPixels / metrics.density;
return Math.min(widthDp, heightDp);
}
/**
* Should a navigation bar appear at the bottom of the screen in the current
* device configuration? A navigation bar may appear on the right side of
* the screen in certain configurations.
*
* @return True if navigation should appear at the bottom of the screen, False otherwise.
*/
public boolean isNavigationAtBottom() {
return (mSmallestWidthDp >= 600 || mInPortrait);
}
/**
* Get the height of the system status bar.
*
* @return The height of the status bar (in pixels).
*/
public int getStatusBarHeight() {
return mStatusBarHeight;
}
/**
* Get the height of the action bar.
*
* @return The height of the action bar (in pixels).
*/
public int getActionBarHeight() {
return mActionBarHeight;
}
/**
* Does this device have a system navigation bar?
*
* @return True if this device uses soft key navigation, False otherwise.
*/
public boolean hasNavigtionBar() {
return mHasNavigationBar;
}
/**
* Get the height of the system navigation bar.
*
* @return The height of the navigation bar (in pixels). If the device does not have
* soft navigation keys, this will always return 0.
*/
public int getNavigationBarHeight() {
return mNavigationBarHeight;
}
/**
* Get the width of the system navigation bar when it is placed vertically on the screen.
*
* @return The width of the navigation bar (in pixels). If the device does not have
* soft navigation keys, this will always return 0.
*/
public int getNavigationBarWidth() {
return mNavigationBarWidth;
}
/**
* Get the layout inset for any system UI that appears at the top of the screen.
*
* @param withActionBar True to include the height of the action bar, False otherwise.
* @return The layout inset (in pixels).
*/
public int getPixelInsetTop(boolean withActionBar) {
return (mTranslucentStatusBar ? mStatusBarHeight : 0) + (withActionBar ? mActionBarHeight : 0);
}
/**
* Get the layout inset for any system UI that appears at the bottom of the screen.
*
* @return The layout inset (in pixels).
*/
public int getPixelInsetBottom() {
if (mTranslucentNavBar && isNavigationAtBottom()) {
return mNavigationBarHeight;
} else {
return 0;
}
}
/**
* Get the layout inset for any system UI that appears at the right of the screen.
*
* @return The layout inset (in pixels).
*/
public int getPixelInsetRight() {
if (mTranslucentNavBar && !isNavigationAtBottom()) {
return mNavigationBarWidth;
} else {
return 0;
}
}
}
}
