Android Activity之间的跳转

 <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.test.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="com.example.test.NextActivity">
        </activity>
    </application>

package com.example.asd;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

	private Button fistButton;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		fistButton = (Button) findViewById(R.id.fistButton);
		fistButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent it = new Intent();
				it.setClass(MainActivity.this, NextActivity.class);
				startActivity(it);
				MainActivity.this.finish();
			}

			
			
		});
	}
}

package com.example.asd;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class NextActivity extends Activity {

	private Button nextButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_next);
		nextButton = (Button) findViewById(R.id.nextButton);
		nextButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();
				intent.setClass(NextActivity.this, MainActivity.class);
				startActivity(intent);
				NextActivity.this.finish();
			}

			
			
		});
	}

}

<activity
            android:name="com.example.test.NextActivity">
          	<intent-filter  >
          	    <action android:name="qwe"/>
          	    <category android:name="android.intent.category.DEFAULT" />
          	</intent-filter>
        </activity>

next.setOnClickListener(new OnClickListener() {
	            @Override
	            public void onClick(View v) {
	               /* Intent intent = new Intent();
	                intent.setClass(MainActivity.this,NextActivity.class);*/
	            	Intent intent=new Intent("qwe");
	                startActivity(intent);
	                MainActivity.this.finish();
	            }
	        });