Intent 使用

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调用浏览器：

<span style="font-size:18px;">Intent intent=new Intent();intent.setAction("android.intent.action.VIEW");//显示指定数据intent.setData(Uri.parse("http://www.baidu.com"));startActivity(intent);</span>

调用拨号器：

<span style="font-size:18px;">Intent intent=new Intent();//Intent intent = new Intent(Intent.ACTION_DIAL);intent.setAction(Intent.ACTION_DIAL);intent.setData(Uri.parse("tel:10000"));startActivity(intent);</span>

向下一个活动传递数据：

<span style="font-size:18px;">String data = "Hello SecondActivity";Intent intent = new Intent(FirstActivity.this, SecondActivity.class);intent.putExtra("extra_data", data);startActivity(intent);</span>

返回数据到上一个活动：

firstActivity:

<span style="color:#000000;">Intent intent = new Intent(FirstActivity.this, SecondActivity.class);startActivityForResult(intent, 1);//1:<span style="font-family:SimSun;color:#000000;font-size:11pt;font-style:normal;font-variant:normal;">请求码</span></span>

secondActivity:

<span style="color:#000000;">Intent intent = new Intent();intent.putExtra("data_return", "Hello FirstActivity");setResult(RESULT_OK, intent);finish();</span>

firstActivity重写onActivityResult()

<span style="font-size:18px;">@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {//<span style="font-family:TimesNewRomanPSMT;color:#000000;font-size:11pt;font-style:normal;font-variant:normal;">requestCode</span>:请求码     switch (requestCode) {     case 1:        if (resultCode == RESULT_OK) {            String returnedData = data.getStringExtra("data_return");            Log.d("FirstActivity", returnedData);        }        break;     default:     }}

打开一个Intent:

<span style="font-size:18px;">Intent intent=new Intent();intent.setAction("android.intent.action.BALA");intent.addCategory("android.intent.action.BALABALA");startActivity(intent);</span>

目标Activity Androidmanifest.xml

<span style="font-size:18px;"><activity android:name="com.example.aaaasasdd.ActionBala">       <intent-filter>             <action android:name="android.intent.action.BALA" />             <category android:name="android.intent.action.BALABALA" />             <category android:name="android.intent.category.DEFAULT"/>       </intent-filter></activity></span>

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