augussmile 2016-04-09 12:01 采纳率: 7.7%
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Android手机应用程序闪退

自己是Android初学新手,按照课本上的示例敲代码,结果安装程序成功后,打开其闪退。。。问了好多次度娘,还是没有着落,还请各位前辈帮帮小弟,不胜感激。。。
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  • augussmile 2016-04-09 12:02
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    代码如下,还请各位前辈帮帮我。。。
    package com.example.myfirstapplycation;

    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.*;
    import android.view.View.OnClickListener;
    import android.view.Menu;
    import android.view.MenuItem;

    public class MainActivity extends Activity {
    private TextView showView=null;
    private TextView note=null;
    private EditText editNum1=null;
    private EditText editNum2=null;
    private Button butadd=null;
    private Button butsub=null;
    private Button butmul=null;
    private Button butdiv=null;
    private int num1=0;
    private int num2=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.showView=(TextView)super.findViewById(R.id.mytext);
    this.editNum1=(EditText)super.findViewById(R.id.myeda);
    this.editNum2=(EditText)super.findViewById(R.id.myedb);
    this.butadd=(Button)super.findViewById(R.id.mybutadd);
    this.butsub=(Button)super.findViewById(R.id.mybutsub);
    this.butmul=(Button)super.findViewById(R.id.mybutmul);
    this.butdiv=(Button)super.findViewById(R.id.mybutdiv);
    this.note=(TextView)super.findViewById(R.id.note);
    this.butadd.setOnClickListener(new AddListener());
    this.butsub.setOnClickListener(new SubListener());
    this.butmul.setOnClickListener(new MulListener());
    this.butdiv.setOnClickListener(new DivListener());
    this.editNum1.setOnClickListener(new OnClickListener(){
    @Override
    public void onClick(View v){
    MainActivity.this.editNum1.setText("");
    }
    });
    this.editNum2.setOnClickListener(new OnClickListener(){
    @Override
    public void onClick(View v){
    MainActivity.this.editNum2.setText("");
    }
    });
    }
    private class AddListener implements OnClickListener{
    public void onClick(View v){
    MainActivity.this.num1=Integer.parseInt(MainActivity.this.editNum1.getText().toString());
    MainActivity.this.num2=Integer.parseInt(MainActivity.this.editNum2.getText().toString());
    MainActivity.this.note.setText("+");
    MainActivity.this.showView.setText(String.valueOf(num1+num2));}
    }
    private class SubListener implements OnClickListener{
    public void onClick(View v){
    MainActivity.this.num1=Integer.parseInt(MainActivity.this.editNum1.getText().toString());
    MainActivity.this.num2=Integer.parseInt(MainActivity.this.editNum2.getText().toString());
    MainActivity.this.note.setText("-");
    MainActivity.this.showView.setText(String.valueOf(num1-num2));}
    }
    private class MulListener implements OnClickListener{
    public void onClick(View v){
    MainActivity.this.num1=Integer.parseInt(MainActivity.this.editNum1.getText().toString());
    MainActivity.this.num2=Integer.parseInt(MainActivity.this.editNum2.getText().toString());
    MainActivity.this.note.setText("*");
    MainActivity.this.showView.setText(String.valueOf(num1*num2));}
    }
    private class DivListener implements OnClickListener{
    public void onClick(View v){
    MainActivity.this.num1=Integer.parseInt(MainActivity.this.editNum1.getText().toString());
    MainActivity.this.num2=Integer.parseInt(MainActivity.this.editNum2.getText().toString());
    MainActivity.this.note.setText("/");
    MainActivity.this.showView.setText(String.valueOf(num1/num2));}
    }

    @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);
    }
    

    }

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