Android(安卓)常用系统功能（打开相册，打开系统设置等等）

1.开开相册：

private void selectImg() {    Intent pickIntent = new Intent(Intent.ACTION_PICK,            MediaStore.Images.Media.EXTERNAL_CONTENT_URI);    pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");    startActivityForResult(pickIntent, RESULT_CODE_2);}

点击相册真的图片返回图片URI：

   @Override    public void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == RESULT_CODE_2) {            Log.i("tgw", "onActivityResult: " + data.getData());        }    }

2.打开系统设置

Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);Uri uri = Uri.fromParts("package", MainActivity.this.getPackageName(), null);intent.setData(uri);startActivity(intent);

3.从 google 搜索内容

Intent intent = new Intent();      intent.setAction(Intent.ACTION_WEB_SEARCH);      intent.putExtra(SearchManager.QUERY, "搜索内容")      startActivity(intent);

4.浏览网页

Uri uri = Uri.parse("http://www.google.com");      Intent it = new Intent(Intent.ACTION_VIEW, uri);      startActivity(it);

5.显示地图

Uri uri = Uri.parse("geo:38.899533,-77.036476");      Intent it = newIntent(Intent.Action_VIEW,uri);      startActivity(it);

6.拨打电话

Uri uri =Uri.parse("tel:xxxxxx");      Intent it = new Intent(Intent.ACTION_DIAL,uri);        startActivity(it);

7.发短信

//方法1：      Intent it = newIntent(Intent.ACTION_VIEW);         it.putExtra("sms_body", "TheSMS text");         it.setType("vnd.android-dir/mms-sms");         startActivity(it);      //方法2：      Uri uri =Uri.parse("smsto:0800000123");         Intent it = newIntent(Intent.ACTION_SENDTO, uri);         it.putExtra("sms_body", "TheSMS text");         startActivity(it);      //方法三：      String body="this is sms demo";      Intent mmsintent = newIntent(Intent.ACTION_SENDTO, Uri.fromParts("smsto", number, null));      mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY,body);      mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE,true);      mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT,true);      startActivity(mmsintent);

8.发 Email

    Uri uri = Uri.parse("mailto:xxx@abc.com");      Intent it = newIntent(Intent.ACTION_SENDTO, uri);      startActivity(it);      Intent it = new Intent(Intent.ACTION_SEND);         it.putExtra(Intent.EXTRA_EMAIL,"me@abc.com");         it.putExtra(Intent.EXTRA_TEXT, "Theemail body text");         it.setType("text/plain");         startActivity(Intent.createChooser(it,"Choose Email Client"));      Intent it=new Intent(Intent.ACTION_SEND);           String[] tos={"me@abc.com"};           String[]ccs={"you@abc.com"};           it.putExtra(Intent.EXTRA_EMAIL, tos);           it.putExtra(Intent.EXTRA_CC, ccs);           it.putExtra(Intent.EXTRA_TEXT, "Theemail body text");           it.putExtra(Intent.EXTRA_SUBJECT, "Theemail subject text");           it.setType("message/rfc822");           startActivity(Intent.createChooser(it,"Choose Email Client"));         Intent it = newIntent(Intent.ACTION_SEND);         it.putExtra(Intent.EXTRA_SUBJECT, "Theemail subject text");          it.putExtra(Intent.EXTRA_STREAM,"file:///sdcard/mysong.mp3");         sendIntent.setType("audio/mp3");         startActivity(Intent.createChooser(it,"Choose Email Client"));

9.播放多媒体

Intent it = new Intent(Intent.ACTION_VIEW);      Uri uri =Uri.parse("file:///sdcard/song.mp3");      it.setDataAndType(uri,"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);

10.卸载 apk

 Uri uri =Uri.fromParts("package", strPackageName, null);         Intent it = newIntent(Intent.ACTION_DELETE, uri);         startActivity(it);

11.安装 apk

Uri installUri = Uri.fromParts("package","xxx", null);      returnIt = newIntent(Intent.ACTION_PACKAGE_ADDED, installUri);      Intent intent = new Intent(Intent.ACTION_VIEW);      intent.setDataAndType(Uri.parse("file://" + filepath),"application/vnd.android.package-archive");      startActivity(intent);// 安装

（12.显示应用详细列表

Uri uri =Uri.parse("market://details?id=app_id");              Intent it = new Intent(Intent.ACTION_VIEW,uri);              startActivity(it);              //where app_id is the application ID, findthe ID               //by clicking on your application on Markethome               //page, and notice the ID from the addressbar      //发现用package name也可以      //Uri uri =Uri.parse("market://details?id=");

13.寻找应用

Uri uri =Uri.parse("market://search?q=pname:pkg_name");              Intent it = new Intent(Intent.ACTION_VIEW,uri);              startActivity(it);      //where pkg_name is the full package pathfor an application

14.打开联系人列表

 //1                 Intent i = new Intent();      i.setAction(Intent.ACTION_GET_CONTENT);      i.setType("vnd.android.cursor.item/phone");      startActivityForResult(i, REQUEST_TEXT);      //2      Uri uri = Uri.parse("content://contacts/people");      Intent it = new Intent(Intent.ACTION_PICK, uri);      startActivityForResult(it, REQUEST_TEXT);

参考：https://blog.csdn.net/aaa111/article/details/41833189

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