Android,使用Intent或Bundle传递参数,跳转页面。

(1)使用Intent跳转页面:

第一个activity:
MainActivity.java中:

Intent myIntent = new Intent();

 myIntent.putExtra("myText", myTextView.getText());

myIntent.setClass(MainActivity.this, Activity2.class);

startActivity(myIntent);

第二个activity:
Activity2.java中:

//从MainActiviry中跳转到这个Activity中利用Intent传递数据。

//获取Intent

Intent intent = getIntent();

String text  = intent.getStringExtra("myText");

 textview2 = (TextView)findViewById(R.id.textView1);

 textview2.setText(text);

(2)如果点击按钮或者链接,打开一个网站。。。

myBtn2.setOnClickListener(new OnClickListener(){

            @Override

            public void onClick(View v) {

                //访问网页。

                Uri uri = Uri.parse("http://www.baidu.com");

                Intent intent = new Intent(Intent.ACTION_VIEW,uri);

                startActivity(intent);

            }

         });

(3)使用Bundle传递参数

源Activity中:MainActivity.java

//使用Bundle传递参数到另一个Activity

        BundleBtn.setOnClickListener(new OnClickListener(){

            @Override

            public void onClick(View v) {

                //使用Bundle传递参数

                Intent myIntent = new Intent();

                Bundle bundle = new Bundle();

                bundle.putString("info",myEditText.getText().toString());

                myIntent.putExtras(bundle);

                myIntent.setClass(MainActivity.this, Activity3Bundle.class);

                startActivity(myIntent);

            }

        });

目标Activity:Activity3Bundle.java

public class Activity3Bundle extends Activity {

    private TextView textView3;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO 自动生成的方法存根

        super.onCreate(savedInstanceState);

         setContentView(R.layout.activity3);



        textView3 = (TextView)findViewById(R.id.textView3);

        Bundle myBundle = this.getIntent().getExtras();

        String myText  = myBundle.getString("info");

        textView3.setText(myText);



    }

}

(4)使用Bundle传递参数,第一个Activity点击一个按钮,跳转到第二个页面。第二个页面输入一个内容,点击按钮,返回第一个Activity,并将第二个Activity中输入的内容显示在第一个Activity中。

第一个Activity代码:

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;



public class MainActivity extends Activity {

    private TextView myTextView;

    private Button ZhuceBtn;

    private final static int REQUESTCODE = 1;//返回的结果码



    //Intent

    private Intent MyIntent;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

         myTextView = (TextView)findViewById(R.id.textView1);

        ZhuceBtn = (Button)findViewById(R.id.buttonzhuce);



        //使用Intent向另一个Activity发送请求,使用Bundle返回参数

        ZhuceBtn.setOnClickListener(new View.OnClickListener(){

            @Override

            public void onClick(View v) {

                // TODO 自动生成的方法存根

                MyIntent = new Intent();

                MyIntent.setClass(MainActivity.this, Activity3Bundle.class);

                startActivityForResult(MyIntent,REQUESTCODE);

            }

        });





    }



    @Override

    protected void onActivityResult(int requestCode,int resultCode,Intent data) {

            // TODO Auto-generated method stub

        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode==REQUESTCODE){

            if(resultCode==2){

                setTitle("Cancel****");

            }else 

                if(resultCode==1){

//              String  Name=data.getStringExtra("username");

                Bundle bundle = data.getExtras();

                String Name = bundle.getString("username");

                myTextView.setText("恭喜您,注册成功。您的用户名是:"+Name);

            }

        }

    }





}

第二个Activity:

public class Activity3Bundle extends Activity {

    private Button zhuceBtn;

    private EditText zhuceEdit;

    private Button buttonCancle;//取消按钮



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO 自动生成的方法存根

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity3);



        zhuceEdit = (EditText)findViewById(R.id.editTextzhuce);

        zhuceBtn = (Button)findViewById(R.id.buttonzhuce);

        buttonCancle = (Button)findViewById(R.id.buttonCancle);



        zhuceBtn.setOnClickListener(new View.OnClickListener(){



            @Override

            public void onClick(View v) {

                //将参数传回请求的Activity

                Intent zhuceIntent = new Intent();

                Bundle myBundle = new Bundle();

                myBundle.putString("username", zhuceEdit.getText().toString());

                //zhuceIntent.putExtra("username", zhuceEdit.getText().toString());

                zhuceIntent.putExtras(myBundle);

                setResult(1,zhuceIntent);

                finish();

            }

        });



        buttonCancle.setOnClickListener(new View.OnClickListener(){



            @Override

            public void onClick(View v) {

                //将参数传回请求的Activity

                Intent zhuceIntent = new Intent();

                setResult(2,zhuceIntent);

                finish();

            }

        });

    }

}

 

原文地址: http://my.eoe.cn/949869/archive/3626.html

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