Many posts are found according to the topic "screenshot a TextView into a Bitmap".
Well, the difference to my problem is, that first the view is drawn on the display (with all layouting and measuring work already done) and then drawn into a Canvas connected to a Bitmap.
I just want to create a TextView from scratch without ever being shown on the display which is rendered into a Bitmap.
This one is the basis configuration which is already workin. A click on the TextView draws itself into a Bitmap and sets it to an ImageView.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical" android:background="#fff">
<TextView android:id="@+id/tv" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="The Quick Brown Fox Jumps Over The Lazy Dog."
android:textSize="20dip" android:background="#abcdef"
android:textColor="#000" android:padding="10dip"
android:layout_margin="10dip" />
<ImageView android:id="@+id/iv" android:layout_width="449px"
android:layout_height="47px" android:background="#56789a"
android:layout_margin="10dip" />
</LinearLayout>
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.tv).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Bitmap bmp = Bitmap.createBitmap(449, 47, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
v.draw(canvas);
ImageView iv = (ImageView) findViewById(R.id.iv);
iv.setImageBitmap(bmp);
}
});
}
Now comes the problematic part. I will create a TextView in Java and I want this one to be drawn straight into a Bitmap. After this I will set this to an ImageView. I never got this running :(
Bitmap bmp = Bitmap.createBitmap(449, 47, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
TextView tv = new TextView(this);
tv.setText("THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG");
tv.setTextSize(55f);
tv.setTextColor(this.getResources().getColor(android.R.color.black));
tv.draw(canvas);
ImageView iv = (ImageView) findViewById(R.id.iv);
iv.setImageBitmap(bmp);
This doesn't work neither in onCreate nor in a OnClickListener. Experimenting with setDrawingCacheEnabled(), measure() and requestLayout() didn't work either.