使提示框居中显示&自定义提示框

ToastActivity.java文件：

 1 public class ToastActivity extends AppCompatActivity {
 2     private Button mbtnToast1,mbtnToast2,mbtnToast3;
 3     @Override
 4     protected void onCreate(Bundle savedInstanceState) {
 5         super.onCreate(savedInstanceState);
 6         setContentView(R.layout.activity_toast);
 7         mbtnToast1=findViewById(R.id.btn_toast1);
 8         mbtnToast2=findViewById(R.id.btn_toast2);
 9         mbtnToast3=findViewById(R.id.btn_toast3);
10         OnClick onClick=new OnClick();
11         mbtnToast1.setOnClickListener(onClick);
12         mbtnToast2.setOnClickListener(onClick);
13         mbtnToast3.setOnClickListener(onClick);
14     }
15
16     class OnClick implements View.OnClickListener{
17
18         @Override
19         public void onClick(View view) {
20             switch (view.getId()){
21                 case R.id.btn_toast1:
22                     Toast.makeText(getApplicationContext(), "点击一", Toast.LENGTH_SHORT).show();
23                     break;
24                 case R.id.btn_toast2:
25                     Toast toastCenter=Toast.makeText(getApplicationContext(),"点击二居中显示",Toast.LENGTH_SHORT);
26                     toastCenter.setGravity(Gravity.CENTER,0,0);
27                     toastCenter.show();
28                     break;//使提示框居中显示
29                 case R.id.btn_toast3:
30                     Toast toastCustom=new Toast(getApplicationContext());
31                     LayoutInflater inflater=LayoutInflater.from(ToastActivity.this);
32                     View view1 = inflater.inflate(R.layout.layout_toast, null);
33                     ImageView imageView=view1.findViewById(R.id.iv_toast);
34                     TextView textView=view1.findViewById(R.id.tv_toast);
35                     imageView.setImageResource(R.drawable.zidingyi);
36                     textView.setText("点击三自定义提示框出现");
37                     toastCustom.setView(view1);
38                     toastCustom.setDuration(Toast.LENGTH_SHORT);
39                     toastCustom.show();
40                     break;
41             }
42         }
43     }
44 }

然后对应activity_toast.xml文件：

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="match_parent"
 3     android:layout_height="match_parent"
 4     android:orientation="vertical">
 5
 6     <Button
 7         android:id="@+id/btn_toast1"
 8         android:layout_width="match_parent"
 9         android:layout_height="wrap_content"
10         android:text="默认"/>
11
12     <Button
13         android:id="@+id/btn_toast2"
14         android:layout_width="match_parent"
15         android:layout_height="wrap_content"
16         android:text="改变提示框出现位置"/>
17
18     <Button
19         android:id="@+id/btn_toast3"
20         android:layout_width="match_parent"
21         android:layout_height="wrap_content"
22         android:text="自定义（带图片）"/>
23
24 </LinearLayout>

还有一个layout_toast.xml文件来定义自定义提示框：

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     android:layout_width="wrap_content"
 3     android:layout_height="wrap_content"
 4     android:orientation="vertical"
 5     android:background="@color/greydrak"
 6     android:layout_gravity="center">
 7     <ImageView
 8         android:id="@+id/iv_toast"
 9         android:layout_width="100dp"
10         android:layout_height="100dp"
11         android:scaleType="fitCenter"
12         android:layout_gravity="center"/>
13
14     <TextView
15         android:id="@+id/tv_toast"
16         android:layout_width="wrap_content"
17         android:layout_height="wrap_content"
18         android:textSize="20dp"
19         android:textColor="@color/white"
20         android:layout_marginTop="5dp"/>
21
22 </LinearLayout>