安卓app_sl4_11使用Toast显示消息提示框

安卓app_sl4_11使用Toast显示消息提示框

通过构造方法创建消息提示框

 

package com.example.sl4_11;
/*
 * 使用Toast显示消息提示框
 */
import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toast.makeText(this, "通过makeText创建消息提示框", Toast.LENGTH_SHORT).show();
        Toast toast=new Toast(this);
        toast.setDuration(Toast.LENGTH_SHORT);
        toast.setGravity(Gravity.CENTER, 0, 0);
        LinearLayout lay1=new LinearLayout(this);
        ImageView iv=new ImageView(this);
        iv.setImageResource(R.drawable.alerm);
        iv.setPadding(0, 0, 5, 0);
        lay1.addView(iv);
        TextView tv=new TextView(this);
        tv.setText("通过构造方法创建消息提示框");
        lay1.addView(tv);
        toast.setView(lay1);
        toast.show();
        
        
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}