我正在为 android 创建一个应用程序,但发现一个错误“不幸的是我的应用程序已停止”所以请帮助我
AndroidManifest .xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.techtips"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.techblogon.activitylifecycleexample.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SecondActivity">
</activity>
</application>
</manifest>
资源/布局
布局2.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView1"
android:layout_marginTop="150dp"
android:layout_gravity="center_horizontal"
android:textSize="23dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This Is Second Activity" />
</LinearLayout>
主要的.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView1"
android:layout_gravity="center_horizontal"
android:textSize="23dp"
android:layout_marginTop="150dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This Is Fist Activity Activity"/>
<Button
android:id="@+id/button1"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" Second Activity "
android:onClick="startSecondActivity"/>
</LinearLayout>
src /com.example.techtip/ MainActivity.java
package com.example.techtips;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Toast.makeText(this, "On Create Called In First Activity",
Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onCreate");
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
Toast.makeText(this, "On Start Called In First Activity",
Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onStart");
}
@Override
protected void onResume()
{
// TODO Auto-generated method stub
super.onResume();
Toast.makeText(this, "On Resume Called In First Activity",
Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onResume");
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
Toast.makeText(this, "On Pause Called In First Activity",
Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onPause");
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
Toast.makeText(this, "On Stop Called In First Activity", Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onStop");
}
@Override
protected void onDestroy()
{
// TODO Auto-generated method stub
super.onDestroy();
Toast.makeText(this, "On Destroy Called In First Activity",
Toast.LENGTH_LONG).show();
Log.i("FirstActivity", "Inside onDestroy");
}
public void startSecondActivity(View V)
{
// create an new Intent and Start Second Activity
Intent intent=new Intent(this,SecondActivity.class);
startActivity(intent);
}
}
SecondActivity.java
package com.example.techtips;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class SecondActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.layout2);
Toast.makeText(this, "On Create Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onCreate");
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
Toast.makeText(this, "On Start Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onStart");
}
@Override
protected void onResume()
{
// TODO Auto-generated method stub
super.onResume();
Toast.makeText(this, "On Resume Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onResume");
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
Toast.makeText(this, "On Pause Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onPause");
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
Toast.makeText(this, "On Stop Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onStop");
}
@Override
protected void onDestroy()
{
// TODO Auto-generated method stub
super.onDestroy();
Toast.makeText(this, "On Destroy Called In Second Activity",
Toast.LENGTH_LONG).show();
Log.i("SecondActivity", "Inside onDestroy");
}
}
请帮助他解决
还请帮助我创建这样的简单应用程序??请帮帮我
图片:i.stack.imgur.com/20iUi.jpg