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Demo,测试了下是可行的,即 A应用里,放了两个应用,接处警应用和B应用,原理很简单,其实就是利用
Android中Intent的显示和隐式使用:代码demo如下:
两种启动方式:
一、只通过包名,启动
二、通过包名,以及类名启动
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A应用
package com.example.a;
import java.util.List;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1 = (Button) findViewById(R.id.btn1);
Button btn2 = (Button) findViewById(R.id.btn2);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
doStartApplicationWithPackageName("com.founder.nnics");
}
});
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
// 第一种方式
ComponentName cn = new ComponentName("com.example.b",
"com.example.b.MainActivity");
try {
intent.setComponent(cn);
// 第二种方式
// intent.setClassName("com.example.fm",
// "com.example.fm.MainFragmentActivity");
intent.putExtra("test", "intent1");
startActivity(intent);
} catch (Exception e) {
// TODO 可以在这里提示用户没有安装应用或找不到指定Activity,或者是做其他的操作
}
}
});
}
private void doStartApplicationWithPackageName(String packagename) {
Log.d("lemonhall", "HelloWorld form doStartApplicationWithPackageName!!");
// 通过包名获取此APP详细信息,包括Activities、services、versioncode、name等等
PackageInfo packageinfo = null;
try {
packageinfo = getPackageManager().getPackageInfo(packagename, 0);
Log.d("lemonhall", packageinfo.toString());
} catch (PackageManager.NameNotFoundException e) {
Log.d("lemonhall", e.toString());
e.printStackTrace();
}
if (packageinfo == null) {
Log.d("lemonhall", "packageinfo == null");
return;
}
// 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
//resolveIntent.addCategory(Intent.CATEGORY_DEFAULT);
resolveIntent.setPackage(packageinfo.packageName);
// 通过getPackageManager()的queryIntentActivities方法遍历
List<ResolveInfo> resolveinfoList = getPackageManager()
.queryIntentActivities(resolveIntent, 0);
Log.d("lemonhall", "resolveinfoList.size::"+resolveinfoList.size());
ResolveInfo resolveinfo = resolveinfoList.iterator().next();
if (resolveinfo != null) {
// packagename = 参数packname
String packageName = resolveinfo.activityInfo.packageName;
// 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式:packagename.mainActivityname]
String className = resolveinfo.activityInfo.name;
// LAUNCHER Intent
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
// 设置ComponentName参数1:packagename参数2:MainActivity路径
ComponentName cn = new ComponentName(packageName, className);
intent.setComponent(cn);
startActivity(intent);
}else{
Log.d("lemonhall", "resolveinfo == null");
}
}
}
import java.util.List;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1 = (Button) findViewById(R.id.btn1);
Button btn2 = (Button) findViewById(R.id.btn2);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
doStartApplicationWithPackageName("com.founder.nnics");
}
});
btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
// 第一种方式
ComponentName cn = new ComponentName("com.example.b",
"com.example.b.MainActivity");
try {
intent.setComponent(cn);
// 第二种方式
// intent.setClassName("com.example.fm",
// "com.example.fm.MainFragmentActivity");
intent.putExtra("test", "intent1");
startActivity(intent);
} catch (Exception e) {
// TODO 可以在这里提示用户没有安装应用或找不到指定Activity,或者是做其他的操作
}
}
});
}
private void doStartApplicationWithPackageName(String packagename) {
Log.d("lemonhall", "HelloWorld form doStartApplicationWithPackageName!!");
// 通过包名获取此APP详细信息,包括Activities、services、versioncode、name等等
PackageInfo packageinfo = null;
try {
packageinfo = getPackageManager().getPackageInfo(packagename, 0);
Log.d("lemonhall", packageinfo.toString());
} catch (PackageManager.NameNotFoundException e) {
Log.d("lemonhall", e.toString());
e.printStackTrace();
}
if (packageinfo == null) {
Log.d("lemonhall", "packageinfo == null");
return;
}
// 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
//resolveIntent.addCategory(Intent.CATEGORY_DEFAULT);
resolveIntent.setPackage(packageinfo.packageName);
// 通过getPackageManager()的queryIntentActivities方法遍历
List<ResolveInfo> resolveinfoList = getPackageManager()
.queryIntentActivities(resolveIntent, 0);
Log.d("lemonhall", "resolveinfoList.size::"+resolveinfoList.size());
ResolveInfo resolveinfo = resolveinfoList.iterator().next();
if (resolveinfo != null) {
// packagename = 参数packname
String packageName = resolveinfo.activityInfo.packageName;
// 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式:packagename.mainActivityname]
String className = resolveinfo.activityInfo.name;
// LAUNCHER Intent
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
// 设置ComponentName参数1:packagename参数2:MainActivity路径
ComponentName cn = new ComponentName(packageName, className);
intent.setComponent(cn);
startActivity(intent);
}else{
Log.d("lemonhall", "resolveinfo == null");
}
}
}
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