Android Intent的用法

传值：

Intent intent=new Intent();
intent.putExtra("extra", "这是页面一传来的值！");
intent.setClass(Test_for_intentActivity.this, actpage2.class);
startActivity(intent);

取值：

Intent intent=getIntent();
String StringE=intent.getStringExtra("extra");
TextView text2=(TextView)findViewById(R.id.textView2);
text2.setText(StringE);

打开网页

1. Uri uri = Uri.parse("http://www.jinzhaow.cn");
2. Intent it  = new Intent(Intent.ACTION_VIEW,uri);
3. startActivity(it); 

拨打电话
Uri uri =Uri.parse("tel:[phone]");
Intent it = new Intent(Intent.ACTION_DIAL,uri);  //ACTION_DIAL只是跳转到拨号界面，ACTION_CALL可以直接拨打电话
startActivity(it);
 
调用发短信
Intent it = newIntent(Intent.ACTION_VIEW);   
it.putExtra("sms_body", "TheSMS text");   
it.setType("vnd.android-dir/mms-sms");   
startActivity(it);

发送附件

1. Intent it = new Intent(Intent.ACTION_SEND);  
   
2. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");  
   
3. it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/jinzhaow.mp3");  
   
4. sendIntent.setType("audio/mp3");  
   
5. startActivity(Intent.createChooser(it, "Choose Email Client"));