不同的2个程序彼此调用

不同的2个程序彼此调用

新建一个继承Activity类的StrartAnotherAndForResultActivity，并设置布局文件为：startanotherandforresult.xml。

首先在布局文件中添加一个TextView和一个Button，TextView用于显示程序运行结果，Button用于调用另外一个程序。

<TextView         android:id="@+id/startanotherforresult_tv01"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center_horizontal"         android:text="@string/strartanotherandforresultactivity"         android:textSize="18sp" />       <Button         android:id="@+id/startanotherforresult_btn01"         style="@android:style/Widget.Button.Inset"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/startanotherproject" />

界面效果：

而后在Activity程序获取组件，为Button添加单击事件。

package lyx.feng.simpletextdemo; ...... public class StartAnotherAndForResultActivity extends Activity implements        OnClickListener {     private Button btn = null;     private TextView tv = null;       @Override     protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.startanotherandforresult);        this.btn = (Button) super               .findViewById(R.id.startanotherforresult_btn01);        this.tv = (TextView) super               .findViewById(R.id.startanotherforresult_tv01);        this.btn.setOnClickListener(this);     }       @Override     public void onClick(View v) {       }   }

接着在onClick（）方法中通过Intent调用一个程序。

Intent intent = new Intent();        try {            intent.setClassName("lyx.feng.helloworld", "MainActivity");            Bundle bundle = new Bundle();            bundle.putString("info", "这个SimpleTextDemo传递过来的数据");            intent.putExtras(bundle);            startActivityForResult(intent, 1);        } catch (Exception e) {            Toast.makeText(this, "你还没有安装HelloWorld这个程序！", Toast.LENGTH_SHORT)                   .show();        }

接着覆写onActivityResult（）方法

@Override     protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode == 1) {            switch (resultCode) {            case RESULT_OK:               tv.setText(data.getExtras().getString("back"));               break;              default:               break;            }        }        super.onActivityResult(requestCode, resultCode, data);     }

接着贴上HelloWorld的Activity代码。

MainActivity：

package lyx.feng.helloworld; ...... public class MainActivity extends Activity {     private Button btn = null;     private TextView tv = null;       @Override     protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.activity_main);        this.btn = (Button) super               .findViewById(R.id.startanotherforresult_btn01);        this.tv = (TextView) super               .findViewById(R.id.startanotherforresult_tv01);        Bundle bundle = getIntent().getExtras();        if (bundle != null) {            this.tv.setText(bundle.getString("send"));        } else {            this.btn.setEnabled(false);        }        this.btn.setOnClickListener(new OnClickListener() {              @Override            public void onClick(View v) {               Intent intent = new Intent();               Bundle bundle = new Bundle();               bundle.putString("back", "这个HelloWorld返回的数据");               intent.putExtras(bundle);               setResult(RESULT_OK, intent);               finish();            }        });     }   }

布局文件：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >       <TextView         android:id="@+id/startanotherforresult_tv01"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center_horizontal"         android:text="@string/_helloworld"         android:textSize="18sp" />       <Button         android:id="@+id/startanotherforresult_btn01"         style="@android:style/Widget.Button.Inset"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/_" />   </LinearLayout>