基于自定义Toast全面解析

Toast.makeText(Context context,String message,int duration);

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  android:gravity="center"
>
  <ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/tianjia_p"
    android:layout_gravity="center"
    />
  <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="hello world"
    android:layout_gravity="center_horizontal"
    android:textSize="20dp"
    />
</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  >
  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/myButton"
    android:text="button"
    />
</LinearLayout>

public class ToastUtil {
  private static Toast toast;
  public static void showToast(int duration,View mview,Context context)
  {
    if (toast==null) {
      toast = new Toast(context);
    }
    toast.setDuration(duration);
    toast.setView(mview);
    toast.show();
  }
}

public class MainActivity extends AppCompatActivity {
private View toast_view;
  private Button button;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    LayoutInflater inflater=LayoutInflater.from(this);
    toast_view =inflater.inflate(R.layout.toast_view,null);
    button=(Button)findViewById(R.id.myButton);
    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        ToastUtil.showToast(Toast.LENGTH_SHORT,toast_view,getApplicationContext());
      }
    });
  }
}