images/loading.gif' data-original="http://images2015.cnblogs.com/blog/822717/201511/822717-20151127172555812-1002143294.gif" />
代码如下:
1 package com.zzw.teststartintentforrequest; 2 3 import android.app.Activity; 4 import android.content.Intent; 5 import android.os.Bundle; 6 import android.util.Log; 7 import android.view.View; 8 import android.view.View.OnClickListener; 9 import android.widget.TextView;10 11 public class MainActivity extends Activity {12 13 private final int REQUESTCODE_MAIN = 1;14 15 private final String KEY_MAIN = "key_main";16 private final String KEY_B = "key_b";17 18 private TextView textView;19 20 @Override21 protected void onCreate(Bundle savedInstanceState) {22 super.onCreate(savedInstanceState);23 setContentView(R.layout.activity_main);24 25 textView = (TextView) findViewById(R.id.textView_main);26 27 findViewById(R.id.button_main).setOnClickListener(new OnClickListener() {28 29 @Override30 public void onClick(View v) {31 Intent intent = new Intent(MainActivity.this, ActivityB.class);32 int a=(int) (Math.random()*100);33 int b=(int) (Math.random()*100);34 int[] nums = { a, b };35 intent.putExtra(KEY_MAIN, nums);36 startActivityForResult(intent, REQUESTCODE_MAIN);37 }38 });39 }40 41 @Override42 protected void onActivityResult(int requestCode, int resultCode, Intent data) {43 if(data!=null){44 Log.d("-------", "requestCode:"+requestCode+" resultCode:"+resultCode);45 textView.setText(data.getIntExtra(KEY_B, 0)+"");46 }47 }48 }
MainActivity.java
1 package com.zzw.teststartintentforrequest; 2 3 import android.app.Activity; 4 import android.content.Intent; 5 import android.os.Bundle; 6 import android.view.View; 7 import android.view.View.OnClickListener; 8 import android.widget.TextView; 9 10 public class ActivityB extends Activity {11 12 private final int RESULTCODE_B=2;13 14 private final String KEY_MAIN="key_main";15 private final String KEY_B="key_b";16 17 private TextView textView;18 19 20 @Override21 protected void onCreate(Bundle savedInstanceState) {22 super.onCreate(savedInstanceState);23 setContentView(R.layout.activityb);24 25 textView=(TextView) findViewById(R.id.textView_B);26 27 int nums[]=this.getIntent().getIntArrayExtra(KEY_MAIN);28 29 final int sum=nums[0]+nums[1];30 31 textView.setText(nums[0]+"+"+nums[1]+"="+sum);32 33 findViewById(R.id.button_B).setOnClickListener(new OnClickListener() {34 35 @Override36 public void onClick(View v) {37 Intent intent=new Intent(ActivityB.this,MainActivity.class);38 intent.putExtra(KEY_B,sum);39 ActivityB.this.setResult(RESULTCODE_B, intent);40 ActivityB.this.finish();41 }42 });43 }44 45 46 }
ActivityB.java
1 <RelativeLayout ="http://schemas.android.com/apk/res/android" 2 ="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:background="@android:color/holo_blue_light" 6 tools:context="com.zzw.teststartintentforrequest.MainActivity" > 7 8 <TextView 9 android:id="@+id/textView_main"10 android:layout_width="wrap_content"11 android:layout_height="wrap_content"12 android:layout_centerInParent="true"13 android:text="0"14 android:textColor="@android:color/holo_red_light"15 android:textSize="30sp" />16 17 <Button18 android:id="@+id/button_main"19 android:layout_width="wrap_content"20 android:layout_height="wrap_content"21 android:layout_alignParentBottom="true"22 android:layout_centerHorizontal="true"23 android:layout_marginBottom="38dp"24 android:background="@android:color/holo_blue_light"25 android:text="点击跳转AcyivityB"26 android:textColor="@android:color/holo_red_light" />27 28 </RelativeLayout>
activity_main.
1 <RelativeLayout ="http://schemas.android.com/apk/res/android" 2 ="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:background="@android:color/black" 6 tools:context="com.zzw.teststartintentforrequest.MainActivity" > 7 8 <TextView 9 android:id="@+id/textView_B"10 android:layout_width="wrap_content"11 android:layout_height="wrap_content"12 android:layout_centerInParent="true"13 android:textColor="@android:color/white"14 android:textSize="30sp" />15 16 <Button17 android:id="@+id/button_B"18 android:layout_width="wrap_content"19 android:layout_height="wrap_content"20 android:textColor="@android:color/white"21 android:background="@android:color/black"22 android:layout_alignParentBottom="true"23 android:layout_centerHorizontal="true"24 android:layout_marginBottom="38dp"25 android:text="点击返回MainAcyivity" />26 27 </RelativeLayout>
activityb.
原标题:两个Activity之间的交互startActivityForResult的使用
关键词: