AndroidManifest.xml
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","按钮的点击监听被触发"); //静态方法 //直接用类名就可以调用,不需要实例化 //构建了一个Toast实例 //方法连 Toast.makeText(this,"按钮的点击监听被触发",Toast.LENGTH_LONG).show();// Toast toast= Toast.makeText(this,"按钮的点击监听被触发",Toast.LENGTH_LONG);// toast.show(); //用intent //取得要传递的信息 //获取View实例 EditText myet=(EditText)findViewById(R.id.myet); String string= myet.getText().toString(); Intent intent= new Intent(this,Main2Activity.class); //存储内容 //getExtra Bundle 实际是一个HashMap 进行了限制 //intent.getExtras().putString("myet",string); intent.putExtra("myet",string); startActivity(intent); } //带返回的方式 public void onCLICK(View v) { EditText myet=(EditText)findViewById(R.id.myet); String string= myet.getText().toString(); Intent intent= new Intent(this,Main2Activity.class); //存储内容 //getExtra Bundle 实际是一个HashMap 进行了限制 //intent.getExtras().putString("myet",string); intent.putExtra("myet",string); //有返回数据的启动方式 //第一个参数 intent //第二个参数 requestCode 请求码 startActivityForResult(intent, 1); } //重写 处理返回信息的监听(回调方法) //onActivityResult通用监听 监听所有返回信息的 //必须要有requestCode区分有哪个请求返回的 @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) { //获取返回信息 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,"返回信息有问题",Toast.LENGTH_SHORT); } } }}
main_layout.xml
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 //获取意图 //传递过来的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) { //关闭当前activity finish(); } public void ONclock(View v) { //存储返回数据 也要用intent EditText mytv=(EditText)findViewById(R.id.mytv); Bundle bundle =new Bundle(); bundle.putString("mytv",mytv.getText().toString()); //设置返回数据 // 先设置ReaultCode,再设置存储数据的意图 setResult(RESULT_OK,new Intent().putExtra("mytv",mytv.getText().toString())); //关闭当前activity finish(); }}
activity_main2.xml