利用Intent在不同的activity之间传递数据

public class MainActivity extends Activity {

      

      private EditText ed_name;

      private ProgressBar  pb;

      private TextView   tv;

      

      @Override

      protected void onCreate(Bundle savedInstanceState) {

             super.onCreate(savedInstanceState);

            setContentView(R.layout. activity_main);

            

             //拿到控件

             ed_name=(EditText) findViewById(R.id. et_name);

             pb=(ProgressBar) findViewById(R.id. pb);

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

            

   }

      

      /**

       * Intent传递数据

       */

      public void click(View view){

            

             tv.setVisibility(View. VISIBLE) ;  //方法调用时tv可见   

             final String name = ed_name.getText().toString().trim();   //得到姓名

            

         new Thread(){

                   public void run() {

                         byte[] results = name.getBytes();

                         int sum=0;

                         pb.setMax(results. length);    //设置进度条的最大值

                         for( int i=0;i<results. length;i++){

                                 int number=( int)results[i];

                                 sum=sum+number;

                                 try {

                                    Thread. sleep(300);

                              } catch (InterruptedException e) {

                                    

                                    e.printStackTrace();

                              }

                                

                                 pb.setProgress(i);    //设置进度条变化

                        }

                        

                         int rp=Math.abs (sum%100);

                        

                         //创建意图开启一个新的界面,并传递数据

                        Intent intent= new Intent(getApplicationContext(),RPActivity.class );

                        intent.putExtra( "name", "HELLO");

                        intent.putExtra( "rp", 123);

                        

                        startActivity(intent);

                        

                  };

                  

                  

                  

            }.start();

            

            

            

            

      }

      

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public class RPActivity extends Activity {

      

      private TextView  tv_info;

      private TextView  result;

      

    @Override

    protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

      setContentView(R.layout. rp);

      

      //拿到控件

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

      result=(TextView) findViewById(R.id. tv_result);

      

        //创建意图

      Intent intent=new Intent();

      String name=intent.getStringExtra( "name");   //接收传递过来的参数

      int  rp=intent.getIntExtra( "rp", 0);

      

      tv_info.setText(name+ "的人品是: ");

      

      if(rp<50){

             tv_info.setTextColor(Color. GREEN);

             tv_info.setText( "计算的人品是:" +rp);

      }else{

             tv_info.setTextColor(Color. BLUE);

             tv_info.setText( "计算的人品是:" +rp);

            

      }

      

      

      

      

    }

}