android - 在android中从一个屏幕导航到另一个屏幕

Question

public class Check extends Activity implements OnClickListener {
    //private check2 check2;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button usemirror = (Button)findViewById(R.id.widget28);
        usemirror.setOnClickListener(this);

    }
    public void onClick(View view){


        Intent mi = new Intent(this , check2.class);
        startActivity(mi);
}
}

package com.exaple;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class check2 extends Activity {
    public void onCreate(Bundle savedInstanceState) {
       // super.onCreate(savedInstanceState);
       // setContentView(R.layout.main);

        Toast.makeText(
                this,
                "Welcome to second page", Toast.LENGTH_LONG).show();
        finish();  

    }

}

Android list .xml

<activity android:name=".check2" >

我这样做但没有显示我在其他 Activity 中写的消息

Answer 1

@Uttam 你没有super not called exception吗？

我想你必须在你的 check2 中调用 super.onCreate()。不在你的 check2 中调用它会导致 Force Close

public class check2 extends Activity {
    public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);   //first call super.onCreate()
       Toast.makeText(
                this,
                "Welcome to second page", Toast.LENGTH_LONG).show();
        finish();  

    }