我想将FrameLayout保存为图片并将其保存在手机中。
FrameLayout位于相对布局中。
FrameLayout有一个ImageView和TextView。
public class ImageText extends AppCompatActivity {
private static final String TAG = " a ";
FrameLayout frameLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_text);
final FrameLayout frameLayout = (FrameLayout)findViewById(R.id.frame);
TextView tv1=(TextView)findViewById(R.id.textView1);
Intent intent=getIntent();
tv1.setText(intent.getStringExtra("text"));
Button bt = (Button) findViewById(R.id.button3);
bt.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
isStoragePermissionGranted();
saveFrameLayout(frameLayout);
}
});
}
public static void saveFrameLayout(FrameLayout frameLayout) {
frameLayout.setDrawingCacheEnabled(true);
frameLayout.buildDrawingCache();
Bitmap cache = frameLayout.getDrawingCache();
frameLayout.setDrawingCacheEnabled(false);
try {
FileOutputStream fileOutputStream = new FileOutputStream(Environment.getExternalStorageDirectory()+ "file.png");
cache.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
fileOutputStream.flush();
fileOutputStream.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
frameLayout.destroyDrawingCache();
}
}
public boolean isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
return true;
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
}
else { //permission is automatically granted on sdk<23 upon installation
Log.v(TAG,"Permission is granted");
return true;
}
}
}
布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_image_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.user.notesk1.ImageText">
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/frame"
>
<ImageView
android:id="@+id/imageView1"
android:layout_width="match_parent"
android:layout_height="300dp"
android:src="@drawable/a"
android:layout_gravity="center"
/>
<TextView
android:id="@+id/textView1"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="text"
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
</FrameLayout>
<Button
android:text="Save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:id="@+id/button3"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
logcat的：
01-02 12:03:26.941 5166-10018/? W/System.err: remove failed: ENOENT (No such file or directory) : /data/user/0/com.touchtype.swiftkey/files/iris_messages_cache
01-02 12:03:26.961 8083-8083/? W/System.err: java.io.FileNotFoundException: /storage/emulated/0file.png: open failed: EACCES (Permission denied)
01-02 12:03:26.971 8083-8083/? W/System.err: at libcore.io.IoBridge.open(IoBridge.java:452)
01-02 12:03:26.971 8083-8083/? W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
01-02 12:03:26.971 8083-8083/? W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:127)
01-02 12:03:26.971 8083-8083/? W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:116)
01-02 12:03:26.971 8083-8083/? W/System.err: at com.example.user.notesk1.ImageText.saveFrameLayout(ImageText.java:58)
01-02 12:03:26.971 8083-8083/? W/System.err: at com.example.user.notesk1.ImageText$1.onClick(ImageText.java:44)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.view.View.performClick(View.java:5714)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.widget.TextView.performClick(TextView.java:10926)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.view.View$PerformClick.run(View.java:22589)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.os.Looper.loop(Looper.java:148)
01-02 12:03:26.971 8083-8083/? W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7325)
01-02 12:03:26.971 8083-8083/? W/System.err: at java.lang.reflect.Method.invoke(Native Method)
01-02 12:03:26.971 8083-8083/? W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
01-02 12:03:26.971 8083-8083/? W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
01-02 12:03:26.971 8083-8083/? W/System.err: Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
01-02 12:03:26.971 8083-8083/? W/System.err: at libcore.io.Posix.open(Native Method)
01-02 12:03:26.971 8083-8083/? W/System.err: at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
01-02 12:03:26.971 8083-8083/? W/System.err: at libcore.io.IoBridge.open(IoBridge.java:438)
01-02 12:03:26.971 8083-8083/? W/System.err: ... 15 more
答案 0 :(得分：0)
尝试以下方法：
更改isStoragePermissionGranted（）方法
private void isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (!checkIfAlreadyhavePermission()) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
saveFrameLayout(frameLayout);
}
} else {
saveFrameLayout(frameLayout);
}
}
private boolean checkIfAlreadyhavePermission() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
return result == PackageManager.PERMISSION_GRANTED;
}
抓住许可结果：
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
saveFrameLayout(frameLayout);
} else {
permission_denied();
}
break;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
public void permission_denied() {
// permission was not granted
if (ActivityCompat.shouldShowRequestPermissionRationale(ImageText.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
showDialogOK("Permission is required for register",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
showCity();
break;
case DialogInterface.BUTTON_NEGATIVE:
// proceed with logic by disabling the related features or quit the app.
break;
}
}
});
} //permission is denied (and never ask again is checked)
//shouldShowRequestPermissionRationale will return false
else {
Toast.makeText(getApplicationContext(), "Go to settings and enable External storage permissions", Toast.LENGTH_LONG).show();
}
}
显示权限对话框：
private void showDialogOK(String message, DialogInterface.OnClickListener okListener) {
new AlertDialog.Builder(getActivity())
.setMessage(message)
.setPositiveButton("OK", okListener)
.setNegativeButton("Cancel", okListener)
.create()
.show();
}
希望这能解决您的许可相关问题......