Draw color line set stroke width Android basic example
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Canvas, drawLine(), setStrokeWidth(), Paint, setAntiAlias(boolean), onDraw()
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);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.YELLOW);
Paint p = new Paint();
// smooths
p.setAntiAlias(true);
p.setColor(Color.RED);
p.setStrokeWidth(4.5f);
// opacity
p.setAlpha(0x80); //
// drawLine (float startX, float startY, float stopX, float stopY,
// Paint paint)
canvas.drawLine(0, 0, 40, 40, p);
canvas.drawLine(40, 0, 0, 40, p);
}
}
}
397LW NO topic_id
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Další témata ....(Topics)
1.) Open DDMS via Menu Tools > Android > Android Device Monitor
2.) Select Device
3.) In DDMS click Menu Window > Show View > File Exlporer
4.) Device > Storage folder
5.) Emulator > data > data folder
2.) Select Device
3.) In DDMS click Menu Window > Show View > File Exlporer
4.) Device > Storage folder
5.) Emulator > data > data folder
Go to Eclipse menu:
Window -> Preferences -> Java -> Code Style -> Formatter
Press NEW profile or EDIT if have you some profile.
Setup your settings.
Save settings.
Window -> Preferences -> Java -> Code Style -> Formatter
Press NEW profile or EDIT if have you some profile.
Setup your settings.
Save settings.
Generate random number Android Java example source code.
Random rand = new Random();
int i = rand.nextInt() % 256; // range -255 +255
System.out.print(i + "
"); // -184
i = Math.abs(rand.nextInt() % 12); // range 0 +11
System.out.print(i); // 7
// Math.random() start with 0. e.g. 0.35981234
int nRan = (int) (Math.random()*10); // 0 - 10
// nextDouble(), nextFloat(), nextInt(), nextLong() returns 0 - 10
import java.util.Random;´
Random r = new Random();
int nRan = r.nextInt(); // 0 - 10
double dRan = r.nextDouble() * 10; // e.g. 7.496285271597397
nextDouble – return 0 - 1
nextFloat – same as double
nextInt – -2147483648 +2147483647
nextLong – -922337203685775808 +9223372036854775807
nextGaussian – 0.0 aberation 1.0.
Delete - unistal app from testing device - emulator and try again RUN - DEBUGG your app.
Download file from Android device using Android Studio
stackoverflow.com/questions/34603355/android-device-monitor-data-folder-is-empty- android.com/studio Start Android Studio
- Root device by Your Android model. This example is for 4.4 kingoapp.com/root-tutorials/how-to-root-android-4.4.htm
- Open command prompt console: Start -> Command prompt
- Write path to ADB plus command, and set chmod for every folder on path to apliccations database, for example: (user is Your name|nick!!!! shell@Kraft-A6000:/ is Your device, this is Lenovo A6000, may be different!!!!)
- Every dot is one line in Command prompt console!!!!! Dont write (press Enter) or (Enter). Dont brake line between root@Kraft-A6000:/ # and (Enter)!
C:\Users\user>c:\Users\user\AppData\Local\Android\sdk\platform-tools\adb shell (press Enter)
shell@Kraft-A6000:/ $
shell@Kraft-A6000:/ $ su (Enter)
root@Kraft-A6000:/ #
root@Kraft-A6000:/ # su -c "chmod 777 /data" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package/databases" (Enter)
root@Kraft-A6000:/ # su -c "chmod 777 /data/data/com.your_package/databases/database_name.db" (Enter)
- Open Android Studio -> Tools -> Android -> Android Device Monitor (meybe some message box, minimalize all windows to find message box - close message box )
- Pull data from Explorer
Date: 13.07.2020 - 08:23
Editace: 2013-12-09 13:11:39
Počet článků v kategorii: 397
Url:draw-line-android-basic-example
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