在使用安卓模拟器加载Flutter应用时，
提示'GL_EXT_shader_framebuffer_fetch' : extension is not supported：
D/skia (14043): Shader compilation error
D/skia (14043): ------------------------
D/skia (14043): 1 #version 300 es
D/skia (14043): 2
D/skia (14043): 3 #extension GL_EXT_shader_framebuffer_fetch : require
D/skia (14043): 4 precision mediump float;
D/skia (14043): 5 precision mediump sampler2D;
D/skia (14043): 6 inout mediump vec4 sk_FragColor;
D/skia (14043): 7 uniform mediump vec4 uleftBorderColor_Stage1_c0_c0;
D/skia (14043): 8 uniform mediump vec4 urightBorderColor_Stage1_c0_c0;
D/skia (14043): 9 uniform sampler2D uTextureSampler_0_Stage1;
D/skia (14043): 10 in mediump vec4 vQuadEdge_Stage0;
D/skia (14043): 11 in mediump vec4 vinColor_Stage0;
D/skia (14043): 12 in highp vec2 vTransformedCoords_0_Stage0;
D/skia (14043): 13 mediump vec4 stage_Stage1_c0_c0_c0_c0(mediump vec4 _input) {
D/skia (14043): 14 mediump vec4 _sample1099_c0_c0;
D/skia (14043): 15 mediump float t = vTransformedCoords_0_Stage0.x + 9.9999997473787516e-06;
D/skia (14043): 16 _sample1099_c0_c0 = vec4(t, 1.0, 0.0, 0.0);
D/skia (14043): 17 return _sample1099_c0_c0;
D/skia (14043): 18 }
D/skia (14043): 19 mediump vec4 stage_Stage1_c0_c0_c1_c0(mediump vec4 _input) {
D/skia (14043): 20 mediump vec4 _sample1767_c0_c0;
D/skia (14043): 21 mediump vec2 coord = vec2(_input.x, 0.5);
D/skia (14043): 22 _sample1767_c0_c0 = texture(uTextureSampler_0_Stage1, coord).xyzw;
D/skia (14043): 23 return _sample1767_c0_c0;
D/skia (14043): 24 }
D/skia (14043): 25 mediump vec4 stage_Stage1_c0_c0(mediump vec4 _input) {
D/skia (14043): 26 mediump vec4 _sample1992;
D/skia (14043): 27 mediump vec4 _sample1099_c0_c0;
D/skia (14043): 28 _sample1099_c0_c0 = stage_Stage1_c0_c0_c0_c0(vec4(1.0));
D/skia (14043): 29 mediump vec4 t = _sample1099_c0_c0;
D/skia (14043): 30 if (t.x < 0.0) {
D/skia (14043): 31 _sample1992 = uleftBorderColor_Stage1_c0_c0;
D/skia (14043): 32 } else if (t.x > 1.0) {
D/skia (14043): 33 _sample1992 = urightBorderColor_Stage1_c0_c0;
D/skia (14043): 34 } else {
D/skia (14043): 35 mediump vec4 _sample1767_c0_c0;
D/skia (14043): 36 mediump vec4 _childInput_c0_c0_c1 = t;
D/skia (14043): 37 _sample1767_c0_c0 = stage_Stage1_c0_c0_c1_c0(_childInput_c0_c0_c1);
D/skia (14043): 38 _sample1992 = _sample1767_c0_c0;
D/skia (14043): 39 }
D/skia (14043): 40 {
D/skia (14043): 41 _sample1992.xyz *= _sample1992.w;
D/skia (14043): 42 }
D/skia (14043): 43 return _sample1992;
D/skia (14043): 44 }
D/skia (14043): 45 void main() {
D/skia (14043): 46 mediump vec4 outputCoverage_Stage0;
D/skia (14043): 47 {
D/skia (14043): 48 mediump float edgeAlpha;
D/skia (14043): 49 mediump vec2 duvdx = dFdx(vQuadEdge_Stage0.xy);
D/skia (14043): 50 mediump vec2 duvdy = -dFdy(vQuadEdge_Stage0.xy);
D/skia (14043): 51 if (vQuadEdge_Stage0.z > 0.0 && vQuadEdge_Stage0.w > 0.0) {
D/skia (14043): 52 edgeAlpha = min(min(vQuadEdge_Stage0.z, vQuadEdge_Stage0.w) + 0.5, 1.0);
D/skia (14043): 53 } else {
D/skia (14043): 54 mediump vec2 gF = vec2((2.0 * vQuadEdge_Stage0.x) * duvdx.x - duvdx.y, (2.0 * vQuadEdge_Stage0.x) * duvdy.x - duvdy.y);
D/skia (14043): 55 edgeAlpha = vQuadEdge_Stage0.x * vQuadEdge_Stage0.x - vQuadEdge_Stage0.y;
D/skia (14043): 56 edgeAlpha = clamp(0.5 - edgeAlpha / length(gF), 0.0, 1.0);
D/skia (14043): 57 }
D/skia (14043): 58 outputCoverage_Stage0 = vec4(edgeAlpha);
D/skia (14043): 59 }
D/skia (14043): 60 mediump vec4 output_Stage1;
D/skia (14043): 61 {
D/skia (14043): 62 mediump vec4 _sample1992;
D/skia (14043): 63 _sample1992 = stage_Stage1_c0_c0(vec4(1.0, 1.0, 1.0, 1.0));
D/skia (14043): 64 output_Stage1 = _sample1992;
D/skia (14043): 65 }
D/skia (14043): 66 {
D/skia (14043): 67 mediump vec4 _dstColor = sk_FragColor;
D/skia (14043): 68 sk_FragColor.w = output_Stage1.w + (1.0 - output_Stage1.w) * _dstColor.w;
D/skia (14043): 69 sk_FragColor.xyz = ((1.0 - output_Stage1.w) * _dstColor.xyz + (1.0 - _dstColor.w) * output_Stage1.xyz) + output_Stage1.xyz * _dstColor.xyz;
D/skia (14043): 70 sk_FragColor = outputCoverage_Stage0 * sk_FragColor + (vec4(1.0) - outputCoverage_Stage0) * _dstColor;
D/skia (14043): 71 }
D/skia (14043): 72 }
D/skia (14043): 73
D/skia (14043): Errors:
D/skia (14043): ERROR: 0:3: 'GL_EXT_shader_framebuffer_fetch' : extension is not supported
D/skia (14043): ERROR: 0:6: 'inout' : syntax error
解决办法：
点击：
setting => Advanced => opengl es api level 修改为opengl es 1.1/2.0
然后重启安卓模拟器即可解决