Zi 字媒體
2017-07-25T20:27:27+00:00
示範
XML
xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
android.support.constraint.ConstraintLayout>
JAVA
public class MainActivity extends AppCompatActivity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new Panel(this));
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
class Panel extends View {
public Panel(Context context) {
super(context);
}
public void onDraw(Canvas canvas) {
Paint paint = new Paint();
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.STROKE);
paint.setTextSize(100);
canvas.drawLine(1000, 1000, 0, 0, paint);
canvas.drawRect(500, 500, 1000, 1000, paint);
canvas.drawCircle(500, 500, 400, paint);
canvas.drawText("Hello!", 500, 600, paint);
}
}
}
展示
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