我们想要在volume、back、menu同一排添加一个虚拟按键，并且触发一个应用；
1、首先我们要找到这些虚拟按键的位置：\frameworks\base\packages\SystemUI\res\layout-sw600dp\navigation_bar.xml
2、横屏时，最左边的RelativeLayout 中添加：
......
android:layout_height="match_parent"
android:layout_width="match_parent"
>
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left">
android:id="@+id/img_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:paddingLeft="5.0dip"
android:src="@drawable/img_logo"
systemui:glowBackground="@drawable/ic_sysbar_highlight"
android:contentDescription="@string/accessibility_recent"/>
......
竖屏时，最左边的RelativeLayout 中添加：
......
android:layout_height="match_parent"
android:layout_width="match_parent"
android:visibility="gone"
android:paddingTop="0dp"
>
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left">
android:id="@+id/img_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:paddingLeft="5.0dip"
android:src="@drawable/img_logo"
systemui:glowBackground="@drawable/ic_sysbar_highlight"
android:contentDescription="@string/accessibility_recent"/>
......
3、添加java触发代码：\frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\phone\NavigationBarView.java
(1) ......
import android.content.ComponentName;//add Await
(2) //add Await 返回图标
public View getImgLogo(){
return mCurrentView.findViewById(R.id.img_logo);
}
(3)添加触发应用：
public void setNavigationIconHints(int hints, boolean force) {
if (!force && hints == mNavigationIconHints) return;
final boolean backAlt = (hints & StatusBarManager.NAVIGATION_HINT_BACK_ALT) != 0;
if ((mNavigationIconHints & StatusBarManager.NAVIGATION_HINT_BACK_ALT) != 0 && !backAlt) {
mTransitionListener.onBackAltCleared();
}
if (DEBUG) {
android.widget.Toast.makeText(mContext,
"Navigation icon hints = " + hints,
500).show();
}
mNavigationIconHints = hints;
((ImageView)getBackButton()).setImageDrawable(backAlt
? (mVertical ? mBackAltLandIcon : mBackAltIcon)
: (mVertical ? mBackLandIcon : mBackIcon));
((ImageView)getRecentsButton()).setImageDrawable(mVertical ? mRecentLandIcon : mRecentIcon);
//add Await
((ImageView)getImgLogo()).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent mIntent = new Intent( );
mIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ComponentName comp = new ComponentName("com.xintu.navcity", "com.xintu.navcity.MainActivity");
mIntent.setComponent(comp);
mIntent.setAction("android.intent.action.VIEW");
mContext.startActivity(mIntent);
}
});
setDisabledFlags(mDisabledFlags, true);
}
)
