Force Screen On - dont use WakeLock - use getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON) - Android sample
FLAG_KEEP_SCREEN_ON saving energy. Protects the battery if a user closing applications using the Return button on device. The device will returned to user screen mode settings.
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
//..........
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
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Další témata ....(Topics)
RelativeLayout like parent, child Srollview is centered horizontal.
Second RelativeLayout in SrollView have gravity center, every child will centered horizontally and vertically.
Second RelativeLayout in SrollView have gravity center, every child will centered horizontally and vertically.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="//schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:gravity="center_horizontal">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/scrollView2" >
<RelativeLayout
android:layout_width="320dp"
android:layout_height="wrap_content"
android:background="#e6f825"
android:gravity="center">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button" />
</RelativeLayout>
</ScrollView>
</RelativeLayout>
Check
- is sett debug mode on device?
- enabled debugging over USB?
- is device right connected?
- have you downloaded and instaled drivers for your device on PC?
- For Windows //developer.android.com/sdk/win-usb.html
- try disconnect and connect USB cable
- try do restart Android Studio
android:background="@android:color/transparent"
<LinearLayout
android:baselineAligned="false"
android:background="@android:color/transparent"
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<LinearLayout>
////////////////////////////
LinearLayout mLinearLayout1 = (LinearLayout)findViewById(R.id.linearLayout1);
mLinearLayout1.setBackgroundColor(Color.TRANSPARENT);
Draw the trajectory of shot.
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
// CONSTRUCTOR
public SampleView(Context context) {
super(context);
setFocusable(true);
}
private static void makePath(Path p) {
p.moveTo(10, 0);
p.cubicTo(100, -50, 200, 150, 300, 0);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.CYAN);
Paint p = new Paint();
// smooths
p.setAntiAlias(true);
p.setColor(Color.RED);
p.setStyle(Paint.Style.STROKE);
p.setStrokeWidth(5);
// opacity
//p.setAlpha(0x80);
p.setColor(Color.BLACK);
Path mPath = new Path();
makePath(mPath);
canvas.drawPath(mPath, p); //(rectF, 90, 45, true, p);
}
}
}
Check your xml files in Eclipse Graphical Editor and fix problems.
Check project setup, right click on project, select properties, Java build path and
select correct Android version etc.
Right click on project, Android Tools, Fix Project Properties
Menu Eclipse select Project ->Clean.

Check project setup, right click on project, select properties, Java build path and
select correct Android version etc.

Right click on project, Android Tools, Fix Project Properties
Menu Eclipse select Project ->Clean.
Editace: 2011-11-07 20:43:56
Počet článků v kategorii: 396
Url:force-screen-on-dont-use-wakelock-use-getwindow-addflagswindowmanager-layoutparams-flag_keep_screen_on-android-sample