I'm having the same error, and ever everything is equal to your example On Nov 16, 7:53 pm, Mario <[email protected]> wrote: > i want to change the color of progressbar as the cursor is moved, but > setProgressDrawable() seems to work only within OnCreate() method, if > i change the ProgressDrawable inside onProgressChanged method > inspecting mSeekBar i can see that the value of Currentdrawable and > ProgressDrawable is updated but the progressbar disappear and it > reappears only when the progressdrawable changes back to the old value > (the one set in the onCreate method) > > public void onProgressChanged(SeekBar seekBar, int progress,boolean > fromTouch) { > seekBar.setProgressDrawable(new_drawable); > > } > > Full code: > public class SeekBar2 extends Activity implements > SeekBar.OnSeekBarChangeListener { > SeekBar mSeekBar; > TextView mProgressText; > TextView mTrackingText; > static LayerDrawable mdrawable_green; > static LayerDrawable mdrawable_blue; > static LayerDrawable mdrawable_red; > > enum BarColor { > RED, BLUE, GREEN; > LayerDrawable getDrawable(){ > switch(this){ > case RED: return mdrawable_red; > case BLUE: return mdrawable_blue; > case GREEN: return mdrawable_green; > default : return mdrawable_red; > } > } > }; > BarColor mcolor; > > public BarColor getColor() { > return mcolor; > } > > public void setColor(SeekBar seekbar,BarColor color) { > this.mcolor = color; > seekbar.setProgressDrawable(color.getDrawable()); > } > > /** Called when the activity is first created. */ > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > mSeekBar = (SeekBar) findViewById(R.id.seek); > mdrawable_green = (LayerDrawable) > this.getResources().getDrawable > (R.drawable.pgreen); > mdrawable_blue = > (LayerDrawable)this.getResources().getDrawable > (R.drawable.pblue); > mdrawable_red = (LayerDrawable)this.getResources().getDrawable > (R.drawable.pred); > > setColor(mSeekBar ,BarColor.RED); > mSeekBar.setOnSeekBarChangeListener(this); > mProgressText = (TextView) findViewById(R.id.progress); > mTrackingText = (TextView) findViewById(R.id.tracking); > > } > > public void onProgressChanged(SeekBar seekBar, int progress, > boolean fromTouch) { > mProgressText.setText(progress + " " + "seekbar_from_touch" > + "=" + fromTouch); > > BarColor color; > if(progress < 33) > color = BarColor.RED; > else if ((progress>=33) && (progress<66)) > color = BarColor.BLUE; > else > color = BarColor.GREEN; > if(color!=mcolor) > setColor(seekBar,color); > > } > > public void onStartTrackingTouch(SeekBar seekBar) { > mTrackingText.setText("seekbar_tracking_on"); > } > > public void onStopTrackingTouch(SeekBar seekBar) { > mTrackingText.setText("seekbar_tracking_off"); > } > > } > > main.xml: > <?xml version="1.0" encoding="utf-8"?> > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ > android" > android:orientation="vertical" > android:layout_width="fill_parent" > android:layout_height="fill_parent"> > > <SeekBar android:id="@+id/seek" > > android:layout_width="fill_parent" > android:layout_height="wrap_content" > android:max="100" > android:progress="0" > android:secondaryProgress="0" > /> > > <TextView android:id="@+id/progress" > android:layout_width="fill_parent" > android:layout_height="wrap_content" /> > > <TextView android:id="@+id/tracking" > android:layout_width="fill_parent" > android:layout_height="wrap_content" /> > </LinearLayout> > > pblue.xml(pred.xml and pgreen.xml are different only for the progress > layer): > > <?xml version="1.0" encoding="utf-8"?> > <layer-list xmlns:android="http://schemas.android.com/apk/res/ > android"> > > <item android:id="@android:id/background"> > <shape> > <corners android:radius="5dip" /> > <gradient > android:startColor="#ff9d9e9d" > android:centerColor="#ff5a5d5a" > android:centerY="0.75" > android:endColor="#ff747674" > android:angle="270" > /> > </shape> > </item> > > <item android:id="@android:id/secondaryProgress"> > <clip> > <shape> > <corners android:radius="5dip" /> > <gradient > android:startColor="#80ffd300" > android:centerColor="#80ffb600" > android:centerY="0.75" > android:endColor="#a0ffcb00" > android:angle="270" > /> > </shape> > </clip> > </item> > > <item android:id="@android:id/progress"> > <clip> > <shape> > <corners android:radius="5dip" /> > <gradient > android:startColor="#ff0099CC" > android:centerColor="#ff3399CC" > android:centerY="0.75" > android:endColor="#ff6699CC" > android:angle="270" > /> > </shape> > </clip> > </item> > > </layer-list> > > Can someone help me? > > thanks
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