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我想將我的畫布狀態保存到我的SD卡或手機圖庫，這對我來說並不重要。 IHAVE下面這些代碼，並點擊屏幕時，文件被保存在SD卡，但作爲一個無法識別的文件，就像一個感嘆號警告標誌PIC是不可用保存畫布後，圖片不可用
代碼：
package your.save.namespace;
import android.app.Activity;
import android.os.Bundle;
import java.io.FileOutputStream;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
public class testSaveView extends Activity
{
SomeView sv = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
sv = new SomeView(this);
setContentView(sv);
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
int type=event.getAction();
Log.i(null,"GOOOD");
if(type==MotionEvent.ACTION_DOWN)
{
if (sv != null)
{
Log.i(null,"GOOOD");
saveView(sv);
return true;
}
Log.i(null,"GOOOD");
}
return true;
}
private void saveView(View view)
{
Log.i(null,"GOOOD");
Log.i(null,"hii"+view.getWidth()+"hello"+view.getHeight());
Bitmap b = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
view.draw(c);
FileOutputStream fos = null;
try {
fos = new FileOutputStream("/sdcard/some_view_image_" + System.currentTimeMillis() + ".png");
Toast.makeText(null, "Saved", Toast.LENGTH_LONG).show();
Log.i(null,"GOOOD");
if (fos != null)
{
Log.i(null,"GOOOD!!!!!!!");
b.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
}
setWallpaper(b);
} catch(Exception e)
{
Log.e("testSaveView", "Exception: " + e.toString());
}
}
class SomeView extends View
{
public SomeView(Context context)
{
super(context);
}
public void onDraw(Canvas canvas)
{
canvas.drawARGB(0x80, 0xff, 0, 0);
Paint paint = new Paint();
paint.setColor(Color.BLUE);
paint.setTextSize(48);
canvas.drawText("...Some view...", 10, canvas.getHeight()/2,
paint);
}
}
}
也許問題是明顯：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="your.save.namespace"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity android:name=".testSaveView"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="3" />
<uses-permission android:name="android.permission.SET_WALLPAPER"></uses-permission>
</manifest>