尝试使用不同的方式设置toast时单击imageview但它不会出现（当单击图像视图时它设置为壁纸）我提供了主要活动和自定义适配器。有人可以帮我这个....
主要活动
public class MainActivity extends AppCompatActivity {
private static final int PERMISSION_REQUEST_CODE = 1000 ;
private static final String TAG = "MainActivity";
private AdView mAdView;
ImageView imageView;
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
List<Item> items;
CustomAdapter adapter;
private long backpressedtime;
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode)
{
case PERMISSION_REQUEST_CODE:
{
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this,"Permission Denied", Toast.LENGTH_SHORT).show();
}
break;
}
}
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String str="Click on Wallpaper to set Wallpaper";
Toast.makeText(getApplicationContext(), str, Toast.LENGTH_LONG).show();
imageView=(ImageView)findViewById(R.id.imageView);
mDrawerLayout=(DrawerLayout) findViewById(R.id.dl);
mToggle=new ActionBarDrawerToggle(this,mDrawerLayout,R.string.open,R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
NavigationView navigationView = (NavigationView) findViewById(R.id.Navigation_v);
setupDrawerContent(navigationView);
ActionBar actionBar = getSupportActionBar();
recyclerView =(RecyclerView)findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
imageView=(ImageView)findViewById(R.id.imageView);
initItem();
//start service and play music
startService(new Intent(MainActivity.this, SoundService.class));
}
public void toast(View v) {
Toast.makeText(MainActivity.this, "Wallpaper Set", Toast.LENGTH_LONG).show();
}
private void initItem() {
items = new ArrayList<>();
items.add(new Item(0,"Wide","https://images8.alphacoders.com/532/thumb-1920-532407.jpg"));
items.add(new Item(1, "Wide","https://images5.alphacoders.com/394/thumb-1920-394511.jpg"));
items.add(new Item(1,"Wide","https://images5.alphacoders.com/408/thumb-1920-408539.jpg"));
items.add(new Item(1,"Wide","https://images6.alphacoders.com/511/thumb-1920-511799.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/465/cropped-1080-1920-465882.jpg?4943"));
items.add(new Item(1,"Wide","https://images7.alphacoders.com/360/thumb-1920-360290.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/244/thumb-1920-244621.jpg"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/429/thumb-1920-429393.jpg"));
items.add(new Item(1,"Wide","https://images2.alphacoders.com/270/thumb-1920-270040.jpg"));
items.add(new Item(1,"Wide","https://images2.alphacoders.com/557/thumb-1920-557022.jpg"));
items.add(new Item(2,"Wide","https://images7.alphacoders.com/556/thumb-1920-556876.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/712/thumb-1920-712830.jpg"));
items.add(new Item(1,"Wide","https://images5.alphacoders.com/414/thumb-1920-414512.jpg"));
items.add(new Item(1,"Wide","https://images5.alphacoders.com/446/thumb-1920-446450.jpg"));
items.add(new Item(1,"Wide","https://images7.alphacoders.com/527/thumb-1920-527526.png"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/556/thumb-1920-556869.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/292/thumb-1920-292661.jpg"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/556/thumb-1920-556872.jpg"));
items.add(new Item(0,"Wide","https://images3.alphacoders.com/566/thumb-1920-566597.jpg"));
items.add(new Item(1,"Wide","https://images.alphacoders.com/646/thumb-1920-646577.jpg"));
items.add(new Item(1,"Wide","https://images8.alphacoders.com/455/thumb-1920-455578.jpg"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/665/thumb-1920-665807.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/566/cropped-1125-2436-566597.jpg?5615"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/532/cropped-1080-1920-532407.jpg?3026"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/416/thumb-1920-416733.jpg"));
items.add(new Item(0,"Wide","https://images3.alphacoders.com/553/thumb-1920-553530.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/712/cropped-1080-1920-712830.jpg?7992"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/556/thumb-1920-556864.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/418/thumb-1920-418866.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/338/thumb-1920-338418.jpg"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/338/thumb-1920-338412.jpg"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/532/thumb-1920-532391.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/338/cropped-1125-2436-338412.jpg?3814"));
items.add(new Item(0,"Wide","https://images8.alphacoders.com/684/thumb-1920-684286.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/532/cropped-1125-2436-532391.jpg?8831"));
items.add(new Item(0,"Wide","https://images3.alphacoders.com/566/thumb-1920-566596.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/416/thumb-1920-416109.png"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/566/cropped-1080-1920-566596.jpg?6441"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/416/cropped-1080-1920-416109.png?5716"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/446/thumb-1920-446459.png"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/446/thumb-1920-446461.png"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/743/thumb-1920-743467.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/446/cropped-1080-1920-446461.png?6653"));
items.add(new Item(0,"Wide","https://images3.alphacoders.com/711/thumb-1920-711797.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/743/cropped-1080-1920-743467.jpg?4344"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/549/thumb-1920-549028.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/549/cropped-1080-1920-549028.jpg?1365"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/867/thumb-1920-867581.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/532/thumb-1920-532782.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/556/thumb-1920-556862.jpg"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/785/thumb-1920-785015.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/785/cropped-1080-1920-785015.jpg?8463"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/713/thumb-1920-713178.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/532/cropped-1080-1920-532415.jpg?6884"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/525/thumb-1920-525415.jpg"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/556/thumb-1920-556858.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/771/cropped-1080-1920-771663.jpg?3059"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/418/thumb-1920-418867.jpg"));
items.add(new Item(0,"Wide","https://images7.alphacoders.com/556/thumb-1920-556871.jpg"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/612/thumb-1920-612095.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/712/thumb-1920-712832.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/465/thumb-1920-465882.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/876/cropped-1080-1920-876467.jpg?1195"));
items.add(new Item(0,"Wide","https://images4.alphacoders.com/807/thumb-1920-807741.jpg"));
items.add(new Item(0,"Wide","https://images8.alphacoders.com/749/thumb-1920-749350.png"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/585/thumb-1920-585994.png"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/556/thumb-1920-556844.jpg"));
items.add(new Item(0,"Wide","https://images8.alphacoders.com/532/thumb-1920-532400.jpg"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/532/thumb-1920-532397.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/532/cropped-1125-2436-532397.jpg?4991"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/532/thumb-1920-532396.jpg"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/526/thumb-1920-526956.jpg"));
items.add(new Item(0,"Fixed","https://initiate.alphacoders.com/images/771/cropped-1080-1920-771665.jpg?511"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/527/thumb-1920-527267.png"));
items.add(new Item(0,"Wide","https://images8.alphacoders.com/434/thumb-1920-434313.jpg"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/527/thumb-1920-527265.png"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/418/thumb-1920-418868.jpg"));
items.add(new Item(0,"Wide","https://images6.alphacoders.com/854/thumb-1920-854137.jpg"));
items.add(new Item(0,"Wide","https://images2.alphacoders.com/556/thumb-1920-556846.jpg"));
items.add(new Item(0,"Wide","https://images.alphacoders.com/649/thumb-1920-649420.jpg"));
items.add(new Item(0,"Wide","https://images5.alphacoders.com/338/thumb-1920-338419.jpg"));
adapter = new CustomAdapter(this,items);
recyclerView.setAdapter(adapter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
protected void onDestroy() {
//stop service and stop music
stopService(new Intent(MainActivity.this, SoundService.class));
super.onDestroy();
}
public void selectItemDrawer(MenuItem menuItem){
Fragment myFragment = null;
Class fragmentClass;
switch (menuItem.getItemId()) {
case R.id.walkthrough:
fragmentClass = Walkthrough.class;
break;
case R.id.info:
fragmentClass = About.class;
break;
default:
fragmentClass = Walkthrough.class;
}
try {
myFragment = (Fragment) fragmentClass.newInstance();
}
catch (Exception e) {
e.printStackTrace();
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flcontent,myFragment).commit();
setTitle(menuItem.getTitle());
mDrawerLayout.closeDrawers();
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
selectItemDrawer(item);
return true;
}
});
}
@Override
public void onBackPressed() {
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("Are you sure you want to exit?");
builder.setCancelable(true);
builder.setNegativeButton("No Stay ;-)", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
});
builder.setPositiveButton("Yes :'-(", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
自定义适配器
公共类CustomAdapter扩展了RecyclerView.Adapter {
Context context;
List<Item> itemList;
public CustomAdapter(Context context, List<Item> itemList) {
this.context = context;
this.itemList = itemList;
}
@Override
public CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(context).inflate(R.layout.item_layout, parent, false);
return new CustomViewHolder(itemView);
}
@Override
public void onBindViewHolder(CustomViewHolder holder, int position) {
Item item = itemList.get(position);
if (item.type == 0) { //new
holder.ribbonLayout.setShowBottom(true);
holder.ribbonLayout.setShowBottom(true);
holder.ribbonLayout.setHeaderTextColor(Color.parseColor("white"));
holder.ribbonLayout.setHeaderText(item.headerText);
Picasso.with(context).load(item.imageURL)
.into(holder.imageView);
holder.imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
Bitmap bitmap = ((BitmapDrawable)((ImageView)view).getDrawable()).getBitmap();
WallpaperManager wallpaperManager = WallpaperManager.getInstance(context);
wallpaperManager.setBitmap(bitmap);
} catch (Exception e) {
e.printStackTrace();
}
}
});
} else
if (item.type == 1) { //hot
holder.ribbonLayout.setShowBottom(false);
holder.ribbonLayout.setShowBottom(false);
holder.ribbonLayout.setHeaderTextColor(Color.parseColor("white"));
holder.ribbonLayout.setHeaderText(item.headerText);
Picasso.with(context).load(item.imageURL)
.into(holder.imageView);
holder.imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
Bitmap bitmap = ((BitmapDrawable)((ImageView)view).getDrawable()).getBitmap();
WallpaperManager wallpaperManager = WallpaperManager.getInstance(context);
wallpaperManager.setBitmap(bitmap);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
@Override
public int getItemCount() {
return itemList.size();
}
}
答案 0 :(得分：0)
您可以使用present(_:animated:completion:)对象
presentViewConroller设置吐司
Custom Adapter