Hello!!everyone,
is there anyway to capture screen?, I find some fuctions :
View v=tv.getRootView();
v.setDrawingCacheEnabled(true);
Bitmap bm= v.getDrawingCache();
why bm==null? help!help!

V should be in the ContentView of the activity, otherwise you won't be able to capture the view. Maybe you could try to manually draw the view.

MrSnowflake wrote:V should be in the ContentView of the activity, otherwise you won't be able to capture the view. Maybe you could try to manually draw the view.

thanks,MrSnowflake,I can get the screen bitmap and draw it in imageview

bm-null!!!!!
Help!!!!!!!!

beaster wrote:

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Using java Syntax Highlighting

1. setContentView(R.layout.main);
2. TextView p=findViewById(r.id.text);
3. p.setDrawingCacheEnabled(true);
4. Bitmap bm= p.getDrawingCache();
5.  

Parsed in 0.030 seconds, using GeSHi 1.0.8.4

bm-null!!!!!
Help!!!!!!!!

p should be in the ContentView of the activity, otherwise you won't be able to get bitmap of the view

the problem is how to get the ContentView of the activity?
it seems I can't get it by GetCurrentFocus() or GetWindow.GetCurrentFocus().
Thanks.

zhufan wrote:

beaster wrote:

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. setContentView(R.layout.main);
2. TextView p=findViewById(r.id.text);
3. p.setDrawingCacheEnabled(true);
4. Bitmap bm= p.getDrawingCache();
5.  

Parsed in 0.033 seconds, using GeSHi 1.0.8.4

bm-null!!!!!
Help!!!!!!!!

p should be in the ContentView of the activity, otherwise you won't be able to get bitmap of the view

Hi ,survivedev
why do you get the content view? if you want to get some view of activity,you can use function "findViewById".
you can use Android' Development Tools:Hierarchy Viewer in tools folder,and then you can see the layout's hierarchy of Views in your activity

hi, zhufan

Thanks a lot for the reply.
it seems I make the problem more complex.
let's see the code:

// from the Hello Activity of the google's example. I just want to capture current screen.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// Set the layout for this activity. You can find it
// in res/layout/hello_activity.xml
setContentView(R.layout.hello_activity); // hello_activity have been defined in the layout xml.
View v = this.findViewById(R.layout.hello_activity); // get current contentview
if( v != null)
{
v.setDrawingCacheEnabled(true);
v.buildDrawingCache();
Bitmap bm = v.getDrawingCache(); // in here the bm is a null value.
try
{
if ( bm != null )
{
/// save to a file
}
}
}

}

however, the bm I get is still null.
so, I'm not quite understand "the contentview of the activity" in your post.
would u like to give some more hints?
thanks a lot!

zhufan wrote:Hi ,survivedev
why do you get the content view? if you want to get some view of activity,you can use function "findViewById".
you can use Android' Development Tools:Hierarchy Viewer in tools folder,and then you can see the layout's hierarchy of Views in your activity

View v = this.findViewById(R.layout.hello_activity);
sure v!=null ? maybe u can use getrootview to get the top view

setContentView(R.layout.main);
bn=(Button)findViewById(R.id.bn);
iv=(ImageView)findViewById(R.id.iv);
bn.setOnClickListener(new OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
View v1=bn.getRootView();
v1.setDrawingCacheEnabled(true);
bm=v1.getDrawingCache();
if(bm!=null){
iv.setImageBitmap(bm);
iv.invalidate();
outputpicture();
}
}

});

many thanks.
it works.

zhufan wrote:View v = this.findViewById(R.layout.hello_activity);
sure v!=null ? maybe u can use getrootview to get the top view

setContentView(R.layout.main);
bn=(Button)findViewById(R.id.bn);
iv=(ImageView)findViewById(R.id.iv);
bn.setOnClickListener(new OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
View v1=bn.getRootView();
v1.setDrawingCacheEnabled(true);
bm=v1.getDrawingCache();
if(bm!=null){
iv.setImageBitmap(bm);
iv.invalidate();
outputpicture();
}
}

});

It simply works with:



main is the content view in this case. You need Bitmap.createBitmap(main.getDrawingCache()); as the Bitmap from which the reference is received by getDrawingCache() gets recycled.

Thanks Danuubz, u saved my time.

the capture image save in gallery ?

Thanks for this
can u tell me what is this
iv=(ImageView)findViewById(R.id.iv);

Danuubz wrote:It simply works with:

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Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. Bitmap screenshot;
2.  
3. main.setDrawingCacheEnabled(true);
4. screenshot = Bitmap.createBitmap(main.getDrawingCache());
5. main.setDrawingCacheEnabled(false);
6.  

Parsed in 0.036 seconds, using GeSHi 1.0.8.4

main is the content view in this case. You need Bitmap.createBitmap(main.getDrawingCache()); as the Bitmap from which the reference is received by getDrawingCache() gets recycled.

Hi,

Here is complete code :