我想保存一个包含两个ImageView的LinearLayout，并且该ImageView中有两个不同的图像。我想在gallery中保存这个布局。任何人都可以告诉我怎么做这个
我使用的代码是：
xml中的：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<LinearLayout android:id="@+id/linear2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
>
<ImageView
android:id="@+id/imageView21"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:src="@drawable/ic_launcher" />
<ImageView
android:id="@+id/imageView22"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:src="@drawable/ic_launcher" />
</LinearLayout>
<RelativeLayout android:id="@+id/linear2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="5"
>
<Button
android:id="@+id/savelayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Save" />
</RelativeLayout>
</LinearLayout>
在活动类......
public class LayoutDisplay2 extends Activity {
Button save;
LinearLayout ll;
ImageView iv1, iv2;
private static int RESULT_LOAD_IMAGE1 = 1;
private static int RESULT_LOAD_IMAGE2 = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.layout2);
ll = (LinearLayout) findViewById(R.id.linear2);
save = (Button) findViewById(R.id.savelayout2);
save.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
ll.setDrawingCacheEnabled(true);
Bitmap bitmap = ll.getDrawingCache();
String root = Environment.getExternalStorageDirectory()
.toString();
File newDir = new File(root + "/saved_picture");
newDir.mkdirs();
Random gen = new Random();
int n = 10000;
n = gen.nextInt(n);
String fotoname = n + ".jpg";
File file = new File(newDir, fotoname);
String s = file.getAbsolutePath();
Log.i("Path of saved image.", s);
System.err.print("Path of saved image." + s);
try {
FileOutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
Toast.makeText(getApplicationContext(), "Photo Saved",
Toast.LENGTH_SHORT).show();
out.close();
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Photo Saved",
Toast.LENGTH_SHORT).show();
Log.e("Exception", e.toString());
}
}
});
iv1 = (ImageView) findViewById(R.id.imageView21);
iv1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE1);
}
});
iv2 = (ImageView) findViewById(R.id.imageView22);
iv2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent in = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(in, RESULT_LOAD_IMAGE2);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE1 && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
try {
iv1.setImageBitmap(BitmapFactory.decodeFile(picturePath));
} catch (Exception e) {
e.printStackTrace();
}
}
if (requestCode == RESULT_LOAD_IMAGE2 && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Toast.makeText(getApplicationContext(), "in second",
Toast.LENGTH_SHORT).show();
Log.i("Second", "in second");
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
try {
iv2.setImageBitmap(BitmapFactory.decodeFile(picturePath));
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
我得到的例外是：
04-17 13:19:33.908: I/Path of saved image.(30459): /mnt/sdcard/saved_picture/3400.jpg
04-17 13:19:33.918: E/Exception(30459): java.io.FileNotFoundException: /mnt/sdcard/saved_picture/3400.jpg (No such file or directory)
答案 0 :(得分：0)
只需在清单文件中添加以下权限：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
编辑：
Boolean isSDPresent = android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
if(isSDPresent)
{
// yes
}
else
{
// No
}