[英]Receiving intent from activity
我有一个问题。 我有自己的文件浏览器,我想实现用于应用程序内文件打开的功能(即图像,视频,pdf等),这是我的代码
public static void openFile(final Context context, final File target) {
final String mime = MimeTypes.getMimeType(target);
final Intent i = new Intent(Intent.ACTION_VIEW);
if (mime != null) {
i.setDataAndType(Uri.fromFile(target), mime);
} else {
i.setDataAndType(Uri.fromFile(target), "*/*");
}
if (context.getPackageManager().queryIntentActivities(i, 0).isEmpty()) {
Toast.makeText(context, R.string.cantopenfile, Toast.LENGTH_SHORT)
.show();
return;
}
try {
context.startActivity(i);
} catch (Exception e) {
Toast.makeText(context,
context.getString(R.string.cantopenfile) + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
}
我的问题是,如何进行查看指定文件的活动以及如何获取意图? 谢谢。 请使用代码作为答案,如果有任何明显的变化,请编写它们。 谢谢 :)
请在清单中添加
<activity android:name=".ui.MyActivity" >
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND_MULTIPLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
</activity>
在你的代码中
void onCreate (Bundle savedInstanceState) {
...
// Get intent, action and MIME type
Intent intent = getIntent();
String action = intent.getAction();
String type = intent.getType();
if (Intent.ACTION_SEND.equals(action) && type != null) {
if ("text/plain".equals(type)) {
handleSendText(intent); // Handle text being sent
} else if (type.startsWith("image/")) {
handleSendImage(intent); // Handle single image being sent
}
} else if (Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null) {
if (type.startsWith("image/")) {
handleSendMultipleImages(intent); // Handle multiple images being sent
}
} else {
// Handle other intents, such as being started from the home screen
}
...
}
void handleSendText(Intent intent) {
String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
if (sharedText != null) {
// Update UI to reflect text being shared
}
}
void handleSendImage(Intent intent) {
Uri imageUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
if (imageUri != null) {
// Update UI to reflect image being shared
}
}
void handleSendMultipleImages(Intent intent) {
ArrayList<Uri> imageUris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
if (imageUris != null) {
// Update UI to reflect multiple images being shared
}
}
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