Android应用间跳转

/**
 * 
* @ClassName: MainActivity
* @Description: 从一个应用跳转到另一个应用
* @author guoyizhe
* @email [email protected]
* @date 2015-6-9 下午3:49:07
*
 */
public class MainActivity extends Activity {

    private Intent intent = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //知道要跳转应用的包名、类名
//        ComponentName comp = new ComponentName("com.gyz.mytextswitchertest", "com.gyz.mytextswitchertest.MainActivity");
//        final Intent intent = new Intent();
//        intent.setComponent(comp);
//        intent.setAction("android.intent.action.VIEW");
        //不知道类名
        PackageManager pm = getPackageManager();
        PackageInfo pi = null;
        try {
            pi = pm.getPackageInfo("com.gyz.mytextswitchertest", 0);
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        
          Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null); 
          resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER); 
          resolveIntent.setPackage(pi.packageName); 

          //找到匹配intent的所有Activity，这个方法可以在intent跳转前调用用来检测是否有符合条件的activity
          List<ResolveInfo> apps = pm.queryIntentActivities(resolveIntent, 0);
          ResolveInfo ri = apps.iterator().next(); 
          if (ri != null ) { 
              String className = ri.activityInfo.name; 

              intent = new Intent(Intent.ACTION_MAIN); 
              intent.addCategory(Intent.CATEGORY_LAUNCHER); 

              ComponentName cn = new ComponentName("com.gyz.mytextswitchertest", className); 

              intent.setComponent(cn); 
          } 
        Button button = (Button) findViewById(R.id.btn_jump);
        button.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                startActivity(intent);
            }
        });
    }
}

原文地址:http://www.cnblogs.com/gyzboy/p/4563774.html