You didn't give your TextView a size. You must first call measure(), then layout(), then you can draw the view.
On Sun, Sep 4, 2011 at 2:43 AM, Marco Alexander Schmitz < [email protected]> wrote: > hi, > > 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 beeing > shown on the display which is rendered into a Bitmap. > > --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- > cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut > --- > > 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> > > public class WorkingActivity extends Activity { > > @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); > } > }); > } > } > > --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- > cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut --- cut > --- > > 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, too... > > Can you help me please on this? > > Greetings, > Marco > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Romain Guy Android framework engineer [email protected] -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
