如何将壁纸设置为锁屏或两者（家庭和锁定）？
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【中文标题】如何将壁纸设置为锁屏或两者（家庭和锁定）？【英文标题】：how to set wallpaper as lockscreen or both(home and lock)? 【发布时间】：2020-03-25 15:09:30 【问题描述】：我已经完成了“将壁纸设置为主屏幕”的实现。但我不知道如何将壁纸设置为锁屏和两者（主页和锁）。在下面的代码中“如果”部分用于设置为主屏幕..rest用于“锁定”和“两者（家庭和锁定）”..将壁纸设置为锁定和两者（家庭和锁定）的逻辑是什么？
代码：
public class ViewImage extends AppCompatActivity
Button button1, button2;
public List<RetroPhoto> product_lists=new ArrayList<>();
private RecyclerView recyclerView;
WallpaperManager myWallpaperManager;
public static FavoriteDatabase favoriteDatabase;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.viewimage_layout);
ImageView mPlace = findViewById(R.id.imagewall);
button1 = findViewById(R.id.button1);
button2 = findViewById(R.id.button2);
ImageButton back = (ImageButton) findViewById(R.id.backToMain);
ImageButton downloadimage = findViewById(R.id.downloadimg);
ImageView favimg = findViewById(R.id.favimg);
recyclerView = findViewById(R.id.rec);
favoriteDatabase = Room.databaseBuilder(getApplicationContext(), FavoriteDatabase.class, "myfavdb").allowMainThreadQueries().build();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
assert navigationView != null;
if (getSupportActionBar() != null)
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
final Bundle bundle = this.getIntent().getExtras();
final String imgUrl = bundle.getString("Title");
Glide.with(this).load(imgUrl)
.thumbnail(0.5f)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(mPlace);
back.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
onBackPressed();
);
button1.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
AlertDialog.Builder builder = new AlertDialog.Builder(ViewImage.this);
// Set the alert dialog title
builder.setTitle("Set Wallpaper");
// Initialize a new string array of flowers
final String[] flowers = new String[]
"Home Screen",
"Lock screen",
"Both"
;
// Set a list for alert dialog
builder.setItems(
flowers, // Items array
new DialogInterface.OnClickListener() // Item click listener
@Override
public void onClick(DialogInterface dialogInterface, int i)
// Get the alert dialog selected item's text
String selectedItem = Arrays.asList(flowers).get(i);
if(selectedItem.equals(flowers[0]))
Glide.with(ViewImage.this)
.load(imgUrl)
.asBitmap()
.into(new SimpleTarget<Bitmap>()
@Override
public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation)
try
WallpaperManager.getInstance(getApplicationContext()).setBitmap(resource);
Toast.makeText(ViewImage.this, "successfully set as home wallpaper", Toast.LENGTH_LONG).show();
catch (IOException e)
e.printStackTrace();
);
else if(selectedItem.equals(flowers[1]))
Uri bitmap = MediaStore.Images.Media.getContentUri(imgUrl);
final Uri finalBitmap = bitmap;
try
WallpaperManager.getInstance(getApplicationContext()).setBitmap(finalBitmap,null,false,WallpaperManager.FLAG_LOCK);
// myWallpaperManager.setBitmap(finalBitmap, null, false, WallpaperManager.FLAG_LOCK);
Toast.makeText(ViewImage.this, "Wallpaper set successfully!", Toast.LENGTH_SHORT).show();
catch (IOException e)
e.printStackTrace();
//Toast.makeText(ViewImage.this, "successfully set as Lock wallpaper", Toast.LENGTH_LONG).show();
else
Toast.makeText(ViewImage.this, "successfully set as both", Toast.LENGTH_LONG).show();
);
// Create the alert dialog
AlertDialog dialog = builder.create();
// Get the alert dialog ListView instance
ListView listView = dialog.getListView();
// Set the divider color of alert dialog list view
listView.setDivider(new ColorDrawable(Color.RED));
// Set the divider height of alert dialog list view
listView.setDividerHeight(0);
// Finally, display the alert dialog
dialog.show();
);
public Bitmap StringToBitMap(String encodedString)
try
byte [] encodeByte= Base64.decode(encodedString,Base64.DEFAULT);
Bitmap bitmap= BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length);
return bitmap;
catch(Exception e)
e.getMessage();
return null;
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item)
if (item.getItemId() == android.R.id.home)
finish(); // close this activity and return to preview activity (if there is any)
return super.onOptionsItemSelected(item);
@Override
public void onBackPressed()
super.onBackPressed();
【问题讨论】：
为什么我会被否决？ 【参考方案1】：检查我的代码是否适合你:)
WallpaperManager myWallpaperManager;
private static final int CHOOSE_IMAGE = 22;
private Button btnSetWallpaper;
String[] options = new String[]
"Home Screen",
"Lock Screen",
"Both"
;
在 OnCreate() 中
btnSetWallpaper = findViewById(R.id.btnSetWallpaper);
btnSetWallpaper.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "choose image"), CHOOSE_IMAGE);
);
在 OnActivityResult() 中
if (requestCode == CHOOSE_IMAGE && data != null)
mCropImageUri = data.getData();
Bitmap bitmap = null;
try
bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), mCropImageUri);
Log.e(TAG, "onActivityResult: BIT " + bitmap);
catch (IOException e)
e.printStackTrace();
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Choose from below");
final Bitmap finalBitmap = bitmap;
builder.setItems(options, new DialogInterface.OnClickListener()
@RequiresApi(api = Build.VERSION_CODES.N)
@Override
public void onClick(DialogInterface dialogInterface, int i)
String selectedItem = Arrays.asList(options).get(i);
if (selectedItem.equals(options[0]))
try
myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
myWallpaperManager.setBitmap(finalBitmap, null, false, WallpaperManager.FLAG_SYSTEM);
Toast.makeText(MainActivity.this, "Wallpaper set successfully!", Toast.LENGTH_SHORT).show();
dialog.dismiss();
catch (Exception e)
Log.e(TAG, "onResourceReady: " + e.getMessage());
else if (selectedItem.equals(options[1]))
try
myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
myWallpaperManager.setBitmap(finalBitmap, null, false, WallpaperManager.FLAG_LOCK);
Toast.makeText(MainActivity.this, "Wallpaper set successfully!", Toast.LENGTH_SHORT).show();
dialog.dismiss();
catch (Exception e)
Log.e(TAG, "onResourceReady: " + e.getMessage());
else if (selectedItem.equals(options[2]))
try
myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
myWallpaperManager.setBitmap(finalBitmap, null, false, WallpaperManager.FLAG_LOCK | WallpaperManager.FLAG_SYSTEM);
Toast.makeText(MainActivity.this, "Wallpaper set successfully!", Toast.LENGTH_SHORT).show();
dialog.dismiss();
catch (Exception e)
Log.e(TAG, "onResourceReady: " + e.getMessage());
);
dialog = builder.create();
dialog.show();
您只想为各种壁纸选项设置标志。 像...这样的标志
WallpaperManager.FLAG_LOCK | WallpaperManager.FLAG_SYSTEM : for both Screen
WallpaperManager.FLAG_SYSTEM : for Home Screen
WallpaperManager.FLAG_LOCK :for Lock Screen
谢谢:)
【讨论】：
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