即使在我的应用程序添加存储权限后，我也无法设置壁纸或下载壁纸（我的应用程序的一个功能）它就像壁纸设置应用程序。并且无法分享壁纸。
这是我做的一段代码。
请查看我的代码并告诉我它有什么问题。
如果有任何解决方案，请逐步向我解释（我是Android的新手）
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.saveitornot.wallit" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<permission android:name="com.saveitornot.wallit.C2D_MESSAGE" android:protectionLevel="signature"/>
<uses-permission android:name="com.saveitornot.wallit.permission.C2D_MESSAGE"/>
<uses-permission android:name="android.permission.MANAGE_DOCUMENTS"/>
<application
android:name=".app.AppController"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".SplashActivity"
android:label="@string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:screenOrientation="portrait"
android:theme="@style/AppTheme.NoActionBar">
</activity>
<activity
android:name=".FullScreenViewActivity"
android:screenOrientation="portrait">
</activity>
<activity
android:name=".SettingsActivity"
android:label="@string/action_settings"
android:screenOrientation="portrait" >
</activity>
</application>
</manifest>
FullscreenViewActivity.java
package com.saveitornot.wallit;
import android.annotation.SuppressLint;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Display;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.JsonObjectRequest;
import com.saveitornot.wallit.app.AppController;
import com.saveitornot.wallit.picasa.model.Wallpaper;
import com.saveitornot.wallit.utils.Utils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class FullScreenViewActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = FullScreenViewActivity.class
.getSimpleName();
public static final String TAG_SEL_IMAGE = "selectedImage";
private Wallpaper selectedPhoto;
private ImageView fullImageView;
private LinearLayout llSetWallpaper, llDownloadWallpaper;
private Utils utils;
private ProgressBar pbLoader;
private CoordinatorLayout coordinatorLayout;
private int progressStatus = 0;
private Handler handler = new Handler();
private String licencseURL,licenseeURL = null;
// Picasa JSON response node keys
private static final String TAG_ENTRY = "entry",
TAG_MEDIA_GROUP = "media$group",
TAG_MEDIA_CONTENT = "media$content", TAG_IMG_URL = "url",
TAG_IMG_WIDTH = "width", TAG_IMG_HEIGHT = "height";
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_fullscreen_image);
fullImageView = (ImageView) findViewById(R.id.imgFullscreen);
llSetWallpaper = (LinearLayout) findViewById(R.id.llSetWallpaper);
llDownloadWallpaper = (LinearLayout) findViewById(R.id.llDownloadWallpaper);
pbLoader = (ProgressBar) findViewById(R.id.pbLoader);
pbLoader.setIndeterminate(true);
pbLoader.setMax(100);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setTitle("");
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
utils = new Utils(getApplicationContext());
// layout click listeners
llSetWallpaper.setOnClickListener(this);
llDownloadWallpaper.setOnClickListener(this);
// setting layout buttons alpha/opacity
llSetWallpaper.getBackground().setAlpha(70);
llDownloadWallpaper.getBackground().setAlpha(70);
Intent i = getIntent();
selectedPhoto = (Wallpaper) i.getSerializableExtra(TAG_SEL_IMAGE);
// check for selected photo null
if (selectedPhoto != null) {
// fetch photo full resolution image by making another json request
fetchFullResolutionImage();
} else {
Toast.makeText(getApplicationContext(),
getString(R.string.msg_unknown_error), Toast.LENGTH_SHORT)
.show();
}
}
/**
* Fetching image fullresolution json
* */
private void fetchFullResolutionImage() {
String url = selectedPhoto.getPhotoJson();
// show loader before making request
pbLoader.setVisibility(View.VISIBLE);
llSetWallpaper.setVisibility(View.GONE);
llDownloadWallpaper.setVisibility(View.GONE);
getSupportActionBar().hide();
// volley's json obj request
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG,
"Image full resolution json: "
+ response.toString());
try {
// Parsing the json response
JSONObject entry = response
.getJSONObject(TAG_ENTRY);
JSONArray mediacontentArry = entry.getJSONObject(
TAG_MEDIA_GROUP).getJSONArray(
TAG_MEDIA_CONTENT);
JSONObject mediaObj = (JSONObject) mediacontentArry
.get(0);
String fullResolutionUrl = mediaObj
.getString(TAG_IMG_URL);
// image full resolution widht and height
final int width = mediaObj.getInt(TAG_IMG_WIDTH);
final int height = mediaObj.getInt(TAG_IMG_HEIGHT);
Log.d(TAG, "Full resolution image. url: "
+ fullResolutionUrl + ", w: " + width
+ ", h: " + height);
ImageLoader imageLoader = AppController
.getInstance().getImageLoader();
// We download image into ImageView instead of
// NetworkImageView to have callback methods
// Currently NetworkImageView doesn't have callback
// methods
///
progressStatus = 0;
new Thread(new Runnable() {
@Override
public void run() {
while (progressStatus<100){
progressStatus += 1;
handler.post(new Runnable() {
@Override
public void run() {
pbLoader.setProgress(progressStatus);
}
});
try {
Thread.sleep(100);
}catch (InterruptedException e)
{
e.printStackTrace();
}
}
}
}).start();
///
imageLoader.get(fullResolutionUrl,
new ImageLoader.ImageListener() {
@Override
public void onErrorResponse(
VolleyError arg0) {
Toast.makeText(
getApplicationContext(),
getString(R.string.msg_wall_fetch_error),
Toast.LENGTH_LONG).show();
}
@Override
public void onResponse(
ImageLoader.ImageContainer response,
boolean arg1) {
if (response.getBitmap() != null) {
// load bitmap into imageview
fullImageView
.setImageBitmap(response
.getBitmap());
adjustImageAspect(width, height);
// hide loader and show set &
// download buttons
pbLoader.setVisibility(View.GONE);
llSetWallpaper
.setVisibility(View.VISIBLE);
llDownloadWallpaper
.setVisibility(View.VISIBLE);
getSupportActionBar().show();
}
}
});
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
getString(R.string.msg_unknown_error),
Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
// unable to fetch wallpapers
// either google username is wrong or
// devices doesn't have internet connection
Toast.makeText(getApplicationContext(),
getString(R.string.msg_wall_fetch_error),
Toast.LENGTH_LONG).show();
}
});
// Remove the url from cache
AppController.getInstance().getRequestQueue().getCache().remove(url);
// Disable the cache for this url, so that it always fetches updated
// json
jsonObjReq.setShouldCache(false);
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq);
}
/**
* Adjusting the image aspect ration to scroll horizontally, Image height
* will be screen height, width will be calculated respected to height
* */
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
private void adjustImageAspect(int bWidth, int bHeight) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
if (bWidth == 0 || bHeight == 0)
return;
int sHeight = 0;
if (android.os.Build.VERSION.SDK_INT >= 13) {
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
sHeight = size.y;
} else {
Display display = getWindowManager().getDefaultDisplay();
sHeight = display.getHeight();
}
int new_width = (int) Math.floor((double) bWidth * (double) sHeight
/ (double) bHeight);
params.width = new_width;
params.height = sHeight;
Log.d(TAG, "Fullscreen image new dimensions: w = " + new_width
+ ", h = " + sHeight);
fullImageView.setLayoutParams(params);
}
/**
* View click listener
* */
@Override
public void onClick(View v) {
Bitmap bitmap = ((BitmapDrawable) fullImageView.getDrawable())
.getBitmap();
switch (v.getId()) {
// button Download Wallpaper tapped
case R.id.llDownloadWallpaper:
utils.saveImageToSDCard(bitmap, coordinatorLayout);
break;
// button Set As Wallpaper tapped
case R.id.llSetWallpaper:
utils.setAsWallpaper(bitmap, coordinatorLayout);
break;
default:
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_fullscreen, menu);
return true;
}
private void gotoURL(String url)
{
Uri uri = Uri.parse(url);
Intent goToWebsite = new Intent(Intent.ACTION_VIEW, uri);
// To count with Play market backstack, After pressing back button,
// to taken back to our application, we need to add following flags to intent.
int flags = Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_MULTIPLE_TASK;
if (Build.VERSION.SDK_INT >= 21)
{
flags |= Intent.FLAG_ACTIVITY_NEW_DOCUMENT;
}
else
{
//noinspection deprecation
flags |= Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET;
}
goToWebsite.addFlags(flags);
try {
startActivity(goToWebsite);
} catch (ActivityNotFoundException e) {
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
Bitmap bitmap = ((BitmapDrawable) fullImageView.getDrawable())
.getBitmap();
switch (id) {
case android.R.id.home:
finish();
return true;
case R.id.action_set_as_wallpaper:
utils.setAsWallpaper(bitmap, coordinatorLayout);
return true;
case R.id.action_download:
utils.saveImageToSDCard(bitmap, coordinatorLayout);
return true;
case R.id.action_share:
utils.shareImage(bitmap, coordinatorLayout);
return true;
case R.id.action_report:
utils.reportImage(bitmap);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
SettingsActivity.java
package com.saveitornot.wallit;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.saveitornot.wallit.app.AppController;
import com.saveitornot.wallit.utils.PrefManager;
public class SettingsActivity extends AppCompatActivity implements View.OnClickListener {
private PrefManager pref;
private TextView txtGoogleUsername, txtNoOfGridColumns, txtGalleryName;
private Button btnSave;
private Button btnClearCache;
private Button btnCacheSize;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
txtGoogleUsername = (TextView) findViewById(R.id.txtGoogleUsername);
txtNoOfGridColumns = (TextView) findViewById(R.id.txtNoOfColumns);
txtGalleryName = (TextView) findViewById(R.id.txtGalleryName);
btnSave = (Button) findViewById(R.id.btnSave);
btnClearCache = (Button) findViewById(R.id.btnClearCache);
btnCacheSize = (Button) findViewById(R.id.btnCacheSize);
pref = new PrefManager(getApplicationContext());
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setTitle(getString(R.string.action_settings));
// Display edittext values stored in shared preferences
// Google username
txtGoogleUsername.setText(pref.getGoogleUserName());
// Number of grid columns
txtNoOfGridColumns.setText(String.valueOf(pref.getNoOfGridColumns()));
// Gallery name
txtGalleryName.setText(pref.getGalleryName());
// Save settings button click listener
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Validating the data before saving to shared preferences
// validate google username
String googleUsername = txtGoogleUsername.getText().toString()
.trim();
if (googleUsername.length() == 0) {
Toast.makeText(getApplicationContext(),
getString(R.string.toast_enter_google_username),
Toast.LENGTH_LONG).show();
return;
}
// validate number of grid columns
String no_of_columns = txtNoOfGridColumns.getText().toString()
.trim();
if (no_of_columns.length() == 0 || !isInteger(no_of_columns)) {
Toast.makeText(getApplicationContext(),
getString(R.string.toast_enter_valid_grid_columns),
Toast.LENGTH_LONG).show();
return;
}
// validate gallery name
String galleryName = txtGalleryName.getText().toString().trim();
if (galleryName.length() == 0) {
Toast.makeText(getApplicationContext(),
getString(R.string.toast_enter_gallery_name),
Toast.LENGTH_LONG).show();
return;
}
// Check for setting changes
if (!googleUsername.equalsIgnoreCase(pref.getGoogleUserName())
|| !no_of_columns.equalsIgnoreCase(String.valueOf(pref
.getNoOfGridColumns()))
|| !galleryName.equalsIgnoreCase(pref.getGalleryName())) {
// User changed the settings
// save the changes and launch SplashScreen to initialize
// the app again
pref.setGoogleUsername(googleUsername);
pref.setNoOfGridColumns(Integer.parseInt(no_of_columns));
pref.setGalleryName(galleryName);
// start the app from SplashScreen
Intent i = new Intent(SettingsActivity.this,
SplashActivity.class);
// Clear all the previous activities
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
} else {
// user not modified any values in the form
// skip saving to shared preferences
// just go back to previous activity
onBackPressed();
}
}
});
btnClearCache.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AppController.getInstance().clearCache();
}
});
btnCacheSize.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AppController.getInstance().getCacheSize();
}
});
}
public boolean isInteger(String input) {
try {
Integer.parseInt(input);
return true;
} catch (Exception e) {
return false;
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
}
}
答案 0 :(得分：1)
public boolean ifPermissionReady(){
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){
System.out.println("req write storage permission*****");
checkPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE, Constant.PERMISSION_WRITE_EXTERNAL_STORAGE);
return false;
}
return true;
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
System.out.println("onRequestPermissionsResult******");
//onStateNotSaved();
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case Constant.PERMISSION_WRITE_EXTERNAL_STORAGE:{
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//Do something
} else {
System.out.println("---> permission denied");
//Do something
}
}
}
}
marshmallow要求开发人员在运行时获取权限。试试上面的代码。