android调用其他apk的activity

<img src="https://img-blog.csdn.net/20160322114625025" alt="" />启动另一个apk的工程

public class MainActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		Log.e("nafio","start load1");

		ComponentName componetName = new ComponentName(
				//这个是另外一个应用程序的包名
				"com.example.t2",
				//这个参数是要启动的Activity
				"com.a.cc.TActivity");

		try {

			Intent intent = new Intent();

			intent.setComponent(componetName);

			startActivity(intent);

		} catch (Exception e) {

			Toast.makeText(getApplicationContext(), "可以在这里提示用户没有找到应用程序，或者是做其他的操作！", 0).show();

			Log.e("nafio",e.getMessage());
		}

		Log.e("nafio","end load");
	}

}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.n.tlaunchotherapk"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".MainActivity"
            android:configChanges="keyboardHidden|navigation"
            android:label="@string/app_name"
            android:screenOrientation="portrait">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

被启动的工程，包名为com.example.t2 ,因为TActivity为非Action.Main,要想外部访问，要加android:exported="true"

package com.example.t2;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		Log.e("nafio","T2---------------");

	}

}

package com.a.cc;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class TActivity  extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		Log.e("nafio","TActivity!!!!!---------------");

	}

}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.t2"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".MainActivity"
            android:configChanges="keyboardHidden|navigation"
            android:label="@string/app_name"
            android:screenOrientation="portrait">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <activity
            android:name="com.a.cc.TActivity"
            android:configChanges="keyboardHidden|navigation"
            android:label="@string/app_name"
            <span style="color:#ff0000;">android:exported="true"</span>
            android:screenOrientation="portrait">
        </activity>

    </application>

</manifest>