观书散遗帙，探古穷至妙。这篇文章主要讲述android activity的常用代码:关闭传值返回值回调网页地图短信电话相关的知识，希望能为你提供帮助。
Intent intent = new Intent();
intent.setClass(Forward.this,
ForwardTarget.class);
//forward为当前activity，forwardTarget为新的activity
startActivity(intent);
finish();
【android activity的常用代码:关闭传值返回值回调网页地图短信电话】
Intent用法实例
1.无参数Activity跳转
Intent it =
new
Intent(Activity.Main.this, Activity2.class);
startActivity(it);
2.向下一个Activity传递数据（使用Bundle和Intent.putExtras）
Intent it =
new
Intent(Activity.Main.this, Activity2.class);
Bundle bundle=new
Bundle();
bundle.putString("name", "This is from MainActivity!");
it.putExtras(bundle);
// it.putExtra(“
test”
, "shuju”
);
startActivity(it);
// startActivityForResult(it,REQUEST_CODE);
对于数据的获取可以采用：
Bundle bundle=getIntent().getExtras();
String name=bundle.getString("name");
3.向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动的Activity）
Intent intent=getIntent();
Bundle bundle2=new
Bundle();
bundle2.putString("name", "This is from ShowMsg!");
intent.putExtras(bundle2);
setResult(RESULT_OK, intent);
4.回调上一个Activity的结果处理函数（onActivityResult）
@Override
protectedvoid
onActivityResult(int
requestCode,
int
resultCode,
Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if
(requestCode==REQUEST_CODE){
if(resultCode==RESULT_CANCELED)
setTitle("cancle");
elseif
(resultCode==RESULT_OK) {
String temp=null;
Bundle bundle=data.getExtras();
if(bundle!=null)
temp=bundle.getString("name");
setTitle(temp);
} } }
下面是转载来的其他的一些Intent用法实例（转自javaeye）
显示网页
1. Uri uri = Uri.parse("http://google.com");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
显示地图
1. Uri uri = Uri.parse("geo:38.899533,-77.036476");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
4. //其他 geo URI 範例
5. //geo:latitude,longitude
6. //geo:latitude,longitude?z=zoom
7. //geo:0,0?q=my+street+address
8. //geo:0,0?q=business+near+city
9. //google.streetview:cbll=lat,lng&
cbp=1,yaw,,pitch,zoom&
mz=mapZoom
路径规划
1. Uri uri = Uri.parse("http://maps.google.com/maps?f=d&
saddr=startLat startLng&
daddr=endLat endLng&
hl=en");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
4. //where startLat, startLng, endLat, endLng are a long with 6 decimals like: 50.123456
打电话
1. //叫出拨号程序
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_DIAL, uri);
4. startActivity(it);
1.
//直接打电话出去
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_CALL, uri);
4. startActivity(it);
5. //用這個，要在 androidManifest.xml 中，加上
6. //<
uses-permission id="android.permission.CALL_PHONE" />
传送SMS/MMS
1.
//调用短信程序
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. it.putExtra("sms_body", "The SMS text");
4. it.setType("vnd.android-dir/mms-sms");
5. startActivity(it);
1.
//传送消息
2. Uri uri = Uri.parse("smsto://0800000123");
3. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
4. it.putExtra("sms_body", "The SMS text");
5. startActivity(it);
1.
//传送 MMS
2. Uri uri = Uri.parse("content://media/external/images/media/23");
3. Intent it = new Intent(Intent.ACTION_SEND);
4. it.putExtra("sms_body", "some text");
5. it.putExtra(Intent.EXTRA_STREAM, uri);
6. it.setType("image/png");
7. startActivity(it);
传送 Email
1. Uri uri = Uri.parse("mailto:[email
protected]");
2. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
3. startActivity(it);
1. Intent it = new Intent(Intent.ACTION_SEND);
2. it.putExtra(Intent.EXTRA_EMAIL, "[email
protected]");
3. it.putExtra(Intent.EXTRA_TEXT, "The email body text");
4. it.setType("text/plain");
5. startActivity(Intent.createChooser(it, "Choose Email Client"));
1. Intent it=new Intent(Intent.ACTION_SEND);
2. String[] tos={"[email
protected]"};
3. String[] ccs={"[email
protected]"};
4. it.putExtra(Intent.EXTRA_EMAIL, tos);
5. it.putExtra(Intent.EXTRA_CC, ccs);
6. it.putExtra(Intent.EXTRA_TEXT, "The email body text");
7. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
8. it.setType("message/rfc822");
9. startActivity(Intent.createChooser(it, "Choose Email Client"));
1. //传送附件
2. Intent it = new Intent(Intent.ACTION_SEND);
3. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
4. it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");
5. sendIntent.setType("audio/mp3");
6. startActivity(Intent.createChooser(it, "Choose Email Client"));
播放多媒体
Uri uri = Uri.parse("file:///sdcard/song.mp3");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.setType("audio/mp3");
startActivity(it);
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
Market 相关
1.
//寻找某个应用
2.
Uri uri = Uri.parse("market://search?q=pname:pkg_name");
3.
Intent it = new Intent(Intent.ACTION_VIEW, uri);
4.
startActivity(it);
5.
//where pkg_name is the full package path for an application
1.
//显示某个应用的相关信息
2.
Uri uri = Uri.parse("market://details?id=app_id");
3.
Intent it = new Intent(Intent.ACTION_VIEW, uri);
4.
startActivity(it);
5.
//where app_id is the application ID, find the ID
6.
//by clicking on your application on Market home
7.
//page, and notice the ID from the address bar
Uninstall 应用程序
1.
Uri uri = Uri.fromParts("package", strPackageName, null);
2.
Intent it = new Intent(Intent.ACTION_DELETE, uri);
3.
startActivity(it);
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