1、如果在一個進程中啟動另外一個進程的activity

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="im.weiyuan.com.hkkj">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
 

        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>
        <activity android:name=".Main2Activity">
            <intent-filter>
                <action android:name="com.weiyuan.test"></action>
                <category android:name="android.intent.category.DEFAULT"
 
></category>
            </intent-filter>
        </activity>
    </application>

</manifest>

package im.weiyuan.com.hkkj;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Toast.makeText(Main2Activity.this,"jksajkdjk",Toast.LENGTH_LONG).show();
    }
}

現在我們在另外一個進程之中啟動商密的Main2Activity

只需要下面的代碼：

package im.weiyuan.com.viewutils;

import android.content.Intent;
import android.os.PersistableBundle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;



public class MainActivity extends AppCompatActivity {

    private  Button btn_main;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         if(savedInstanceState != null){
             Toast.makeText(MainActivity.this,savedInstanceState.getString("data"),Toast.LENGTH_LONG).show();
         }
        btn_main = (Button) findViewById(R.id.btn_main);
        btn_main.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction("com.weiyuan.test");
                startActivity(intent);
            }
        });
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.d("123456","onStop is called");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.d("123456","onPause is called");
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Log.d("123456","onSaveInstanceState is called");
        outState.putString("data","1020223");
    }


}

這裏就可以啟動了。

現在我們在Main2Activity中添加自定義權限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="im.weiyuan.com.hkkj">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        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>
        <activity android:name=".Main2Activity"
            android:permission="com.weiyuan.sb"
            >
            <intent-filter>
                <action android:name="com.weiyuan.test"></action>
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </activity>
    </application>

</manifest>

啟動端如果不進行配置，就會奔潰，啟動者的

MainActivity 清單文件需要對上面的權限進行配置

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="im.weiyuan.com.viewutils">
  <permission android:name="com.weiyuan.sb"></permission>
  <uses-permission android:name="com.weiyuan.sb"></uses-permission>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        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>

然後在使用下面的代碼進行啟動：

 Intent intent = new Intent();
                intent.setAction("com.weiyuan.test");
                startActivity(intent);

android 中使用自定義權限