这篇文章主要记录一些常用的一些代码段，方便以后查阅，不断更新中。
1：调用浏览器，载入某网址
Uri uri = Uri.parse("http://www.android100.org/");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
2：Broadcast接收系统广播的intent监控应用程序包的安装、删除
public class getBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction())) {
Toast.makeText(context, "有应用被添加", Toast.LENGTH_LONG).show();
} else if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) {
Toast.makeText(context, "有应用被删除", Toast.LENGTH_LONG).show();
}
else if (Intent.ACTION_PACKAGE_REPLACED.equals(intent.getAction())) {
Toast.makeText(context, "有应用被替换", Toast.LENGTH_LONG).show();
}
else if (Intent.ACTION_CAMERA_BUTTON.equals(intent.getAction())) {
Toast.makeText(context, "按键", Toast.LENGTH_LONG).show();
}
}
}
需要声明的权限如下AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="zy.Broadcast" android:versionCode="1" android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Broadcast" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="getBroadcast" android:enabled="true">
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED"></action>
<!-- <action android:name="android.intent.action.PACKAGE_CHANGED"></action> -->
<action android:name="android.intent.action.PACKAGE_REMOVED"></action>
<action android:name="android.intent.action.PACKAGE_REPLACED"></action>
<!-- <action android:name="android.intent.action.PACKAGE_RESTARTED"></action> -->
<!-- <action android:name="android.intent.action.PACKAGE_INSTALL"></action> -->
<action android:name="android.intent.action.CAMERA_BUTTON"></action>
<data android:scheme="package"></data>
</intent-filter>
</receiver>
</application>
<uses-sdk android:minSdkVersion="3" />
</manifest>
3：使用Toast输出一个字符串
public void DisplayToast(String str) {
Toast.makeText(this,str,Toast.LENGTH_SHORT).show();
}
4：把一个字符串写进文件
public void writefile(String str, String path) {
File file;
FileOutputStream out;
try {
// 创建文件
file = new File(path);
file.createNewFile();
//打开文件file的OutputStream
out = new FileOutputStream(file);
String infoToWrite = str;
//将字符串转换成byte数组写入文件
out.write(infoToWrite.getBytes());
//关闭文件file的OutputStream
out.close();
}
catch (IOException e) {
// 将出错信息打印到Logcat
DisplayToast(e.toString());
}
}
5：把文件内容读出到一个字符串
public String getinfo(String path) {
File file;
String str="";
FileInputStream in;
try {
//打开文件file的InputStream
file = new File(path);
in = new FileInputStream(file);
//将文件内容全部读入到byte数组
int length = (int)file.length();
byte[] temp = new byte[length];
in.read(temp, 0, length);
//将byte数组用UTF-8编码并存入display字符串中
str = EncodingUtils.getString(temp,TEXT_ENCODING);
//关闭文件file的InputStream
in.close();
}
catch (IOException e) {
DisplayToast(e.toString());
}
return str;
}
6：调用Android installer安装和卸载程序
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File("/sdcard/WorldCupTimer.apk")), "application/vnd.android.package-archive");
startActivity(intent); //安装 程序
Uri packageURI = Uri.parse("package:zy.dnh");
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);
startActivity(uninstallIntent);//正常卸载程序
7：结束某个进程
?
1
activityManager.restartPackage(packageName);
8：设置默认来电铃声
public void setMyRingtone() {
File k = new File("/sdcard/Shall We Talk.mp3"); // 设置歌曲路径
ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath());
values.put(MediaStore.MediaColumns.TITLE, "Shall We Talk");
values.put(MediaStore.MediaColumns.SIZE, 8474325);
values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");
values.put(MediaStore.Audio.Media.ARTIST, "Madonna");
values.put(MediaStore.Audio.Media.DURATION, 230);
values.put(MediaStore.Audio.Media.IS_RINGTONE, true);
values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false);
values.put(MediaStore.Audio.Media.IS_ALARM, false);
values.put(MediaStore.Audio.Media.IS_MUSIC, false);
// Insert it into the database
Uri uri = MediaStore.Audio.Media.getContentUriForPath(k.getAbsolutePath());
Uri newUri = this.getContentResolver().insert(uri, values);
RingtoneManager.setActualDefaultRingtoneUri(this, RingtoneManager.TYPE_RINGTONE, newUri);
}
需要的权限
<uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>
模拟HOME按键
Intent i=new Intent(Intent.ACTION_MAIN);
i.addCategory(Intent.CATEGORY_HOME);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
9：打开某一个联系人
Intent intent=new Intent();
String data = "content://contacts/people/1";
Uri uri = Uri.parse(data);
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);
10：发送文件
void sendFile(String path) {
File mZipFile=new File(path);
Intent intent = new Intent(Intent.ACTION_SEND);
// intent.setClassName("com.android.bluetooth", "com.broadcom.bt.app.opp.OppLauncherActivity");
// intent.setClassName("com.android.bluetooth", "com.android.bluetooth.opp.BluetoothOppLauncherActivity");
intent.putExtra("subject", mZipFile
.getName()); //
intent.putExtra("body", "content by chopsticks"); // 正文
intent.putExtra(Intent.EXTRA_STREAM,
Uri.fromFile(mZipFile)); // 添加附件，附件为file对象
if (mZipFile.getName().endsWith(".gz")) {
intent
.setType("application/x-gzip"); // 如果是gz使用gzip的mime
} else if (mZipFile.getName().endsWith(
".txt")) {
intent.setType("text/plain"); // 纯文本则用text/plain的mime
} else if (mZipFile.getName().endsWith(
".zip")) {
intent.setType("application/zip"); // 纯文本则用text/plain的mime
} else {
intent
.setType("application/octet-stream"); // 其他的均使用流当做二进制数据来发送
}
// startActivity(intent);
startActivity(
Intent.createChooser(intent,
"选择蓝牙客户端"));
}
