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打开一个app就闪退解决方法
最近在学android,这边有个小问题,打开这个应用就闪退是什么原因?
package com.example.linearlayouttest;
import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.Button;
import android.widget.LinearLayout;
public class LinearLayoutTest extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_linear_layout_test); LinearLayout root =(LinearLayout)findViewById(R.id.root); Button bn1=(Button)findViewById(R.id.bn1); bn1.setText(R.string.bn1); root.addView(bn1);
Button bn2=(Button)findViewById(R.id.bn2); bn2.setText(R.string.bn2); root.addView(bn2); }
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.linear_layout_test, menu); return true; } }
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"
android:gravity="bottom|center_horizontal" android:id="@+id/root" >
[解决办法]
LinearLayout root =(LinearLayout)findViewById(R.id.root); root.addView(bn1); root.addView(bn2);
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