Question

我正在尝试将一个意图字符串/Download/income_tax_return.pdf作为广播从App A发送到App B.在App A中，我有以下MainActivity。

package com.mysender;


import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final Intent intent=new Intent();
        intent.setAction("com.mysender.Data");
        intent.putExtra("path", "/Download/income_tax_return.pdf");
        intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
        intent.setComponent(new ComponentName("com.example.app","com.example.app.MainActivity"));
        sendBroadcast(intent);

    }
}

初始化意图后，我将意图的操作设置如下：com.mysender.Data并将意图作为广播发送到应用程序B com.example.app但是在启动App A然后启动App BI时不是从MyReceiver获取Toast消息。如何将App A的意图发送到App B？我没有收到任何错误。

以及下面的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mysender">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

在App B中，我在MainActivity中执行以下操作：

P

ackage com.example.app;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends Activity {

    private WebView mWebView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Receive broad Cast fromn External App
        IntentFilter filter = new IntentFilter("com.mysender.Data");
        registerReceiver(myReceiver, filter);

    }
    private MyReceiver myReceiver =new MyReceiver(){
        @Override
        public void onReceive(Context context, Intent intent) {
            String path = intent.getStringExtra("path");
            Toast.makeText(context,"Data Received from External App: " + path, Toast.LENGTH_SHORT).show();

        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(myReceiver);

    }
}

AndroidManifest.xml App B：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.app" >
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
        <activity
            android:name="com.example.app.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

修改

所以我在第二个应用程序的Manifest中注册了MyReceiver但是我仍然没有得到路径字符串：

<receiver android:name=".MyReceiver"
    android:enabled="true"
    android:exported="true">
    <intent-filter>
        <action android:name="com.mysender.Data" />
    </intent-filter>
</receiver>

Answer 1

我认为您必须在第二个应用中注册意图过滤器，否则它将不会监听您发送的意图。

Answer 2

我的代码有效我必须删除以下行：

intent.setComponent(new ComponentName("com.example.app","com.example.app.MainActivity"));

它甚至可以在App B的清单中注册接收器。

从App A发送广播并在应用B中接收

2 个答案: