task跳转任务

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//mainactivity

protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button button1=(Button) findViewById(R.id.button1);Button button2=(Button) findViewById(R.id.button2);button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View view) {// TODO Auto-generated method stubIntent intent =new Intent(MainActivity.this,SecondActivity.class);startActivity(intent);}});button2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent intent= new Intent(Intent.ACTION_DIAL);intent.setData(Uri.parse("12580"));startActivity(intent);}});

//secondactivity

protected void onCreate(Bundle savedInstanceState) {<span style="white-space:pre"></span>super.onCreate(savedInstanceState);<span style="white-space:pre"></span>setContentView(R.layout.activity_second);<span style="white-space:pre"></span>Button button1=(Button) findViewById(R.id.button1);<span style="white-space:pre"></span>button1.setOnClickListener(new OnClickListener() {<span style="white-space:pre"></span><span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onClick(View view) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>Intent intent =new Intent(SecondActivity.this,MainActivity.class);<span style="white-space:pre"></span>startActivity(intent);<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});

<pre name="code" class="java">

//button1,2,3        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/textView1"        android:layout_centerHorizontal="true"        android:layout_marginTop="82dp"        android:text="@string/button1" />

<span style="white-space:pre"></span>android:id="@+id/button2"        style="?android:attr/buttonStyleSmall"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_centerVertical="true"        android:text="@string/button2" />

<span style="white-space:pre"></span>android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/textView1"        android:layout_centerHorizontal="true"        android:layout_marginTop="80dp"        android:text="@string/button3" />

<img src="http://img.blog.csdn.net/20160925203528673?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /><img src="http://img.blog.csdn.net/20160925203538138?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /><img src="http://img.blog.csdn.net/20160925203746644?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

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