我想从我的Android应用程序启动一个已安装的包。我认为使用意图是可能的,但我没有找到一种方法来做到这一点。有没有链接,在哪里可以找到相关信息?
当前回答
启动新活动的步骤如下:
1.获取包的意图
2.如果意图为空重定向用户到播放商店
3.如果意图不为空,打开活动
public void launchNewActivity(Context context, String packageName) {
Intent intent = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.CUPCAKE) {
intent = context.getPackageManager().getLaunchIntentForPackage(packageName);
}
if (intent == null) {
try {
intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(Uri.parse("market://details?id=" + packageName));
context.startActivity(intent);
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + packageName)));
}
} else {
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
}
其他回答
根据评论进行编辑
在某些版本中(如注释中建议的那样),抛出的异常可能不同。
因此,下面的解决方案稍作修改
Intent launchIntent = null;
try{
launchIntent = getPackageManager().getLaunchIntentForPackage("applicationId");
} catch (Exception ignored) {}
if(launchIntent == null){
startActivity(new Intent(Intent.ACTION_VIEW).setData(Uri.parse("https://play.google.com/store/apps/details?id=" + "applicationId")));
} else {
startActivity(launchIntent);
}
原来的答案
虽然回答得很好,有一个相当简单的实现来处理如果应用程序没有安装。我这样做
try{
startActivity(getPackageManager().getLaunchIntentForPackage("applicationId"));
} catch (PackageManager.NameNotFoundException e) {
startActivity(new Intent(Intent.ACTION_VIEW).setData(Uri.parse("https://play.google.com/store/apps/details?id=" + "applicationId")));
}
将“applicationId”替换为要打开的包,如com.google。地图等。
下面是我的例子,如果有人觉得有用,我就从我的应用程序中启动条形码/QR码扫描仪
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.setPackage("com.google.zxing.client.android");
try
{
startActivityForResult(intent, SCAN_REQUEST_CODE);
}
catch (ActivityNotFoundException e)
{
//implement prompt dialog asking user to download the package
AlertDialog.Builder downloadDialog = new AlertDialog.Builder(this);
downloadDialog.setTitle(stringTitle);
downloadDialog.setMessage(stringMessage);
downloadDialog.setPositiveButton("yes",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialogInterface, int i)
{
Uri uri = Uri.parse("market://search?q=pname:com.google.zxing.client.android");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
try
{
myActivity.this.startActivity(intent);
}
catch (ActivityNotFoundException e)
{
Dialogs.this.showAlert("ERROR", "Google Play Market not found!");
}
}
});
downloadDialog.setNegativeButton("no",
new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int i)
{
dialog.dismiss();
}
});
downloadDialog.show();
}
由于kotlin现在变得非常流行,我认为在kotlin中也提供一个简单的解决方案是合适的。
var launchIntent: Intent? = null
try {
launchIntent = packageManager.getLaunchIntentForPackage("applicationId")
} catch (ignored: Exception) {
}
if (launchIntent == null) {
startActivity(Intent(Intent.ACTION_VIEW).setData(Uri.parse("https://play.google.com/store/apps/details?id=" + "applicationId")))
} else {
startActivity(launchIntent)
}
我知道这个问题已经得到了回答,但以下是我如何实现类似的东西:
Intent intent = getPackageManager().getLaunchIntentForPackage("com.package.name");
if (intent != null) {
// We found the activity now start the activity
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
} else {
// Bring user to the market or let them choose an app?
intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(Uri.parse("market://details?id=" + "com.package.name"));
startActivity(intent);
}
更好的方法是:
public void startNewActivity(Context context, String packageName) {
Intent intent = context.getPackageManager().getLaunchIntentForPackage(packageName);
if (intent != null) {
// We found the activity now start the activity
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
} else {
// Bring user to the market or let them choose an app?
intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(Uri.parse("market://details?id=" + packageName));
context.startActivity(intent);
}
}
删除重复代码:
public void startNewActivity(Context context, String packageName) {
Intent intent = context.getPackageManager().getLaunchIntentForPackage(packageName);
if (intent == null) {
// Bring user to the market or let them choose an app?
intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("market://details?id=" + packageName));
}
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
// in onCreate method
String appName = "Gmail";
String packageName = "com.google.android.gm";
openApp(context, appName, packageName);
public static void openApp(Context context, String appName, String packageName) {
if (isAppInstalled(context, packageName))
if (isAppEnabled(context, packageName))
context.startActivity(context.getPackageManager().getLaunchIntentForPackage(packageName));
else Toast.makeText(context, appName + " app is not enabled.", Toast.LENGTH_SHORT).show();
else Toast.makeText(context, appName + " app is not installed.", Toast.LENGTH_SHORT).show();
}
private static boolean isAppInstalled(Context context, String packageName) {
PackageManager pm = context.getPackageManager();
try {
pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
return true;
} catch (PackageManager.NameNotFoundException ignored) {
}
return false;
}
private static boolean isAppEnabled(Context context, String packageName) {
boolean appStatus = false;
try {
ApplicationInfo ai = context.getPackageManager().getApplicationInfo(packageName, 0);
if (ai != null) {
appStatus = ai.enabled;
}
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return appStatus;
}
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