AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.hanqi.test4"> <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"></activity> </application> </manifest>
MainActivity
package com.hanqi.test4; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import android.widget.EditText; import android.widget.Toast; /** * Created by Administrator on 2016/3/21. */ public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_layout); } //普通方式 public void ONCLICK(View v) { Log.e("T4TAG","按鈕的點擊監聽被觸發"); //靜態方法 //直接用類名就可以調用,不需要實例化 //構建了一個Toast實例 //方法連 Toast.makeText(this,"按鈕的點擊監聽被觸發",Toast.LENGTH_LONG).show(); // Toast toast= Toast.makeText(this,"按鈕的點擊監聽被觸發",Toast.LENGTH_LONG); // toast.show(); //用intent //取得要傳遞的信息 //獲取View實例 EditText myet=(EditText)findViewById(R.id.myet); String string= myet.getText().toString(); Intent intent= new Intent(this,Main2Activity.class); //存儲內容 //getExtra Bundle 實際是一個HashMap 進行了限制 //intent.getExtras().putString("myet",string); intent.putExtra("myet",string); startActivity(intent); } //帶返回的方式 public void onCLICK(View v) { EditText myet=(EditText)findViewById(R.id.myet); String string= myet.getText().toString(); Intent intent= new Intent(this,Main2Activity.class); //存儲內容 //getExtra Bundle 實際是一個HashMap 進行了限制 //intent.getExtras().putString("myet",string); intent.putExtra("myet",string); //有返回數據的啟動方式 //第一個參數 intent //第二個參數 requestCode 請求碼 startActivityForResult(intent, 1); } //重寫 處理返回信息的監聽(回調方法) //onActivityResult通用監聽 監聽所有返回信息的 //必須要有requestCode區分有哪個請求返回的 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); Log.e("TAG","requestCode="+requestCode+"resultCode"+resultCode); if (requestCode ==1 ) { if (resultCode == RESULT_OK) { //獲取返回信息 String string = data.getExtras().getString("mytv"); EditText editText =(EditText)findViewById(R.id.myet); editText.setText(string); Toast.makeText(this, "返回信息=" + string, Toast.LENGTH_LONG); } else { Toast.makeText(this,"返回信息有問題",Toast.LENGTH_SHORT); } } } }
main_layout.xml
<?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"> <EditText android:layout_width="100dp" android:layout_height="wrap_content" android:id="@+id/myet" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="普通方式" android:onClick="ONCLICK" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="帶返回方式" android:onClick="onCLICK" /> </LinearLayout>
Main2Activity
package com.hanqi.test4; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.EditText; public class Main2Activity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); //接受信息 //獲取意圖 //傳遞過來的Intent Intent intent=getIntent(); String s = intent.getExtras().getString("myet"); EditText mytv=(EditText)findViewById(R.id.mytv); mytv.setText(s); } //普通返回 public void onclick(View V) { //關閉當前activity finish(); } public void ONclock(View v) { //存儲返回數據 也要用intent EditText mytv=(EditText)findViewById(R.id.mytv); Bundle bundle =new Bundle(); bundle.putString("mytv",mytv.getText().toString()); //設置返回數據 // 先設置ReaultCode,再設置存儲數據的意圖 setResult(RESULT_OK,new Intent().putExtra("mytv",mytv.getText().toString())); //關閉當前activity finish(); } }
activity_main2.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.hanqi.test4.Main2Activity"> <EditText android:layout_width="100dp" android:layout_height="wrap_content" android:text="測試" android:id="@+id/mytv" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="普通返回" android:onClick="onclick" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="帶數據返回" android:onClick="ONclock" /> </LinearLayout>